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  • Estimation of the spawning ground of some fish species in the Nha Trang bay

    Vo, Van Quang; Tran, Thi Hong Hoa; Tran, Cong Thinh; Le, Thi Thu Thao (2020)
    The paper presents the results of determining the spawning grounds of some fish species in Nha Trang bay MPA, which were sampled in 9/2018, 11/2018, 5/2019 and 7/2019. The analysis results are based on the distribution of the general density and the developmental stages, analysis of decision trees from egg density, location of stations and months by CHAID (Chi-square Automatic Interaction Detector), allowing a relatively accurate estimate of the spawning ground of the red anchovy (Encrasicholina punctifer Fowler, 1938) and the species of the genus Scarus. As a result, the main spawning grounds for red anchovy were the east of Hon Rua and the northeast of Hon Tam and that of Scarus is the southwest of Hon Mun island.
  • Captive culture of two sea snake species Hydrophis curtus and Hydrophis cyanocinctus

    Nguyen, Trung Kien; Hua, Thai An; Huynh, Minh Sang; Do, Huu Hoang; Cao, Van Nguyen; Ho, Thi Hoa (2020)
    Acclimation culture and trial culture of two sea snake species Hydrophis curtus and H. cyanocinctus in composite tanks were conducted to determine growth, survival rate, predation behavior and prey selection. The results showed that adults of H. curtus and H. cyanocinctus did not capture any prey such as anchovy, eel and shrimp in a period of 30 days of acclimation culture. The body weight of two these species reduced gradually from 783.3 ± 76.4 g and 360.0 ± 60.0 g to 660.0 ± 135.2 g and 315.0 ± 77.8 g, respectively. Survival rate was 100% in H. curtus and 80% in H. cyanocinctus. Meanwhile, the results of acclimation culture of sea snake juvenile revealed that frozen anchovy was preferred prey in both of two species. The body weight of H. curtus increased from 49.8 ± 0.5 g to 70.0 ± 8.2 g and that of H. cyanocinctus was 44.3 ± 3.1 g to 47.1 ± 5.2 g. The prey capture rate of H. curtus and H. cyanocinctus was 100% and 60%, respectively. Survival rate of the juvenile of two species was 100% after 30 days of acclimation culture. In 60 days of trial culture, similar results as acclimation culture were observed in adults of two sea snake species, they still did not capture any prey and the body weight reduced gradually. The result of 60-day culture of sea snake juvenile showed that the prey capture rate was 100% in both of two species. The body weight of H. curtus and H. cyanocinctus increased from 70.0 ± 8.2 g and 57.5 ± 5.8 g to 78.3 ± 15.3 g and 65.0 ± 14.1, respectively. SGR of H. curtus was 0.16 ± 0.32 %/day and that of H. cyanocinctus was 0.52 ± 0.36%/day. The survival rate of H. curtus and H. cyanocinctus was 60% and 40% in period of 60 day trial.
  • Morphology, abundance and the invasiveness of coral-killing sponge Chalinula nematifera (Porifera: Demosponigiae) from Con Dao National Park, Vietnam

    Thai, Minh Quang (2020)
    This is the first study on morphology, abundance and invasion of coral-killing sponge Chalinula nematifera (De Laubenfels, 1954) from offshore waters in Con Dao islands, Vietnam. The results of the study show that the morphology is similar to that in the Western Pacific, but differs in skeletal structure compared to the description in the Eastern Pacific. The density of C. nematifera (average ± standard deviation) is 2.02 ± 5.03 colonies per 100 m2 (present at 12/15 survey stations) with the number of colonization belonging to diameter group 5–20 cm. They invade 30 species belonging to 23 genera of Scleractinia corals (44.7% on foliose/laminar and encrusting coral, 23.86% on massive coral and 21.97% on branching coral). The ability to invade corals of C. nematifera does not limit the host. So, this is considered a potential hazard to the East Vietnam Sea coral reefs in the future.
  • Some species of macro-gastropods in the coastal zone of Khanh Hoa province

    Bui, Quang Nghi; Nguyen, Thi My Ngan; Nguyen, Kha Phu (2020)
    From November 2013 to March 2014, 104 species were collected, belonging to 27 families, 58 genera of Gastropoda in coastal area of Khanh Hoa province. Some families have a large number of species such as Conidae - 15 species; Strombidae - 15 species; Cypraeidae - 10 species; Terebridae - 7 species and Muricidae - 6 species. Many species of economic value are used for food and fine arts. 11 species are listed in Vietnam Red Data Book. Besides, images and information of samples (collecting date, place of sample collection,...) are presented.
  • Species composition and distribution of seaweeds in Phu Yen province

    Nguyen, Thi Thu Hang; Nguyen, Van Tu; Vo, Van Phu; Nguyen, Ngoc Lam (2020)
    Results of four field surveys, conducted from June 2017 to June 2018 found that in the Phu Yen coastal water, a total of 103 seaweed species have been recorded, increasing the total number of seaweed species in Phu Yen province to 133 species, with 81 newly recorded species for Phu Yen geographic area. Among 103 seaweed species, 4 species belong to Cyanobacteria, 38 species belong to Rhdophytes, 24 species belong to Phaeophytes, and 37 species belong to Chlorophytes. The number of species at surveyed sites V1 to V9 varies from 3 species/site (V3) to 83 species/site (V7) and on average 27 species/site. Sørensen’s similarity coefficient varies from 0.05 (between V3 and V7) to 0.86 (V3 and V4) and on average 0.25. 74/103 species were collected in the littoral zone, 67 species in sublittoral zone and most of them are distributed at 0-4 m water depth of subtidal zone. The marine algal flora is represented by mixing of subtropical and tropical characteristics as Cheney index was 3.
  • Assessment of effective coral rehabilitated in Marine Protected Areas of South Vietnam

    Hoang, Xuan Ben; Vo, Si Tuan; Phan, Kim Hoang (2020)
    More than 20,300 fragment corals belonging to 24 species, eight genera and six families were rehabilitated in marine protected areas of south Vietnam. Mean survival rates of coral fragments ranged from 60–97.7%, the average growth rate of the branched corals was 4.8 mm/month meanwhile the foliose coral was 1.9 mm/month. The survival and growth rate of corals are different among areas because each coral species has different biological characteristics, structure colonies and due to differences in natural conditions each area. The results showed that the growth rate of corals will return to normal after 4 months rehabilitation. The factors affected the effective coral rehabilitation including: Coral reef predators, spatial competition among species, environmental conditions change due to human’s activities; and other factors such as hydrodynamic regimes, cutting fragment corals cause its injury damage. The rehabilitation and protection activities of coral reefs in marine protected areas should be continued and expanded, contributing to the protection of biodivesity, marine resource and sustainable coral reefs ecosystem development.
  • Bleaching of coral in Nha Trang, Ninh Thuan, Con Dao and Phu Quoc islands in June–July 2019

    Phan, Kim Hoang; Vo, Si Tuan; Thai, Minh Quang; Dao, Tan Hoc; Hua, Thai Tuyen (2020)
    The studies on coral bleaching were conducted at 21 sites of 4 reef areas in Southern Vietnam, using point transect technique in June–July 2019. Cover of hard corals in the selected sites was quite high with the average values of 65.6 ± 18% % in Con Dao islands, 58.7 ± 26.2% in Ninh Thuan coastal waters, 55.9 ± 17.8% in Phu Quoc island but lower in Nha Trang bay (22.8 ± 15.9%). Soft corals were not abundant with the highest cover in Nha Trang bay (4.73 ± 5.5%) and the lowest in Ninh Thuan (0.16 ± 0.3%). Hard corals were most impacted in Nha Trang bay with 39.5 ± 8.1% bleached, followed by Ninh Thuan reefs (32.9 ± 13.3%), Con Dao Islands (25.0 ± 11.1%) and least affected in Phu Quoc island (7.3 ± 9.05%). For soft corals, ratios of bleached corals were 79.4%, 65.8% and 23.8% in Con Dao islands, Nha Trang bay and Ninh Thuan reefs respectively. No bleached soft coral was recorded in Phu Quoc. At the genus level, Acropora corals were severely affected in Nha Trang bay, Ninh Thuan reefs and Phu Quoc island but not impacted in Con Dao islands. The Porites, Montipora, Millepora genera were quite vulnerable in all sites but no bleaching was observed for Galaxea and Diploastrea genera.
  • Levels of heavy metals in seawater, sediment and in the tissue of Crassostrea belcheri in the Western estuary of Ganh Rai bay

    Le, Hung Phu; Nguyen, Hong Thu; Pham, Hong Ngoc; Le, Trong Dung; Dao, Viet Ha (2020)
    Recent studies have shown that the seawater, sediment and commercial bivalve molluscs in the studied area have been contaminated by some heavy metals Zn, Cu, Pb and Cr. Highly toxic heavy metals like As, Cd, Pb, Hg have tended to accumulate in the tissue of clams. This paper presents the levels of some heavy metals in the seawater, sediment and soft part of oyster (Crassostrea belcheri) samples collected from the western estuaries of Ganh Rai bay in 2015 and 2017. The results also showed that Ha Thanh and Rach Lo sites recorded the highest contents of most studied metals in oyster samples. Levels of metals in oyster were in the order of Zn > Cu > As > Pb > Cr > Cd > Hg and the contents of metals in oyster did not reflect a correlation with those in surrounding environment. Concerning food safety criteria, Pb, Cd and Hg contents were lower than acceptable limit given by the compilation of FAO (1983), whereas As, Cu and Zn contents exceeded the legal limit, especially Zn contents. Cu and Cr contents in sediment samples of Nga Bay and Dong Hoa estuaries were between LEL-SEL values (≥ LEL and < SEL), which may cause biological impacts at moderate level.
  • Zooplankton community in Thi Nai lagoon in the period of 2001-2020

    Nguyen, Tam Vinh; Doan, Nhu Hai (2020)
    This paper presents the results of the surveys on zooplankton in Thi Nai lagoon from 2001 to 2020. There were 179 species found in the lagoon, among which Copepod was the dominant group with 97 species (50.78% of total species), followed by Cladocera with 20 species (10.36%), Hydrozoa with 18 species (9.33%), Tunicata with 11 species (5.7%) and Siphonophora with 10 species (5.18%). Based on Bray-Curtis similarity analysis of zooplankton community and the station position, the sampling stations in the lagoon were grouped into three areas: The upper lagoon (UP), the middle (MI), and the mouth of the lagoon (MO). Among the surveyed years, there was a slight variation in the species number, while the density decreased by time and was especially low in 2020. Zooplankton density was much lower in the rainy season compared to that in the dry season, while the species number was less varied. Analysis of the differences between the areas in the lagoon demonstrated a clear distribution pattern of zooplankton with a decreasing density and an increasing number of species from upper lagoon to the mouth of the lagoon. Zooplankton diversity was less affected by time and only the Pielou index in the MI area between 2004 and 2009 was significantly different. Analysis of the various indices between seasons showed that the MO area was less volatile than the two other regions. The multi-dimensional scaling analysis demonstrated that zooplankton community was less variable by regions (50% similarity) compared to by the years (only 30% of similarity), except in 2009 and 2020 when differences among the areas were significant. Seasonal community change between the dry and rainy seasons was 30%.
  • Variation of phytoplankton community structure in Quang Ngai coastal waters during 2015-2019

    Huynh, Thi Ngoc Duyen; Tran, Thi Minh Hue; Tran, Thi Le Van; Phan, Tan Luom; Nguyen, Ngoc Lam; Doan, Nhu Hai (2020)
    Phytoplankton in coastal waters are important for the evaluation of either biodiversity or environmental impacts because of this highly vulnerable ecosystem. Seasonal and annual changes in the phytoplankton community structure in Quang Ngai waters during the period 2015 to 2019 were analyzed to assess the phytoplankton diversity and reveal possible causes of these changes. A total of 366 phytoplankton taxa belonging to 10 classes were identified throughout this present study. The highest species number was found in 2019 with 295 taxa, followed by those in 2015 (247), 2017 (185), and 2018 (99). The waters of Ly Son transect showed the highest diversity and most stable phytoplankton communities in both dry and rainy seasons, whereas the stations of Quang Ngai coast revealed high variability of the communities. All diversity indices including Margalef, Pielou, Shannon, Simpson did not reflect well differences in average values but a certain degree of variances, indicating possible environmental impacts. During the study time, there were blooms of certain diatom species including Skeletonema spp. in 2015 and Pseudo-nitzschia spp. in 2019. Analysis of a diatoms index, Centric/Pennate ratio, indicated that the waters were in eutrophic status with a decreasing trend from the coast area to Ly Son island in 2015 and 2019. This research built up fundamental data on phytoplankton communities for Quang Ngai province. The Centric/Pennate diatom index and diversity would be used as indicators for environmental changes and their values provided warning of eutrophication in this coastal waters including the water surrounding Ly Son island.
  • Study on distribution characteristics of wind speed field in the sea area of Ly Son island of Quang Ngai province

    Tran, Van Chung; Ngo, Manh Tien; Nguyen, Van Long (2020)
    On the basis of the data source of the 10 m wind field above the sea with the hourly frequency and during the period of 41 years (1979–2019) by the NCEP CFRS, we used the probability distribution functions to study the distribution law of wind speed in the waters of Ly Son island. Specifically, four distribution functions (normal distribution, gamma distribution, Weibull distribution and extreme value distribution) were used to estimate the characteristic parameters of the shape and proportion of the wind distribution in the waters of Ly Son island.
  • Fluctuations of wind and temperature fields in Ninh Thuan-Binh Thuan waters and its possible relationship with coral bleaching

    Van Chung, Tran; Manh Tien, Ngo; Van Nguyen, cao (2020)
    Temperature and wind on the sea surface are factors affecting the development of coral reefs in the seawaters. The research results show that the warming of sea water under the condition of weak wind field is considered a major threat to the bleaching of coral reefs in the sea areas of the Ninh Thuan - Binh Thuan provinces.
  • Benthic assemblages for ecological evaluation of Lake Manzala, Mediterranean Sea, ‎Egypt.

    El Komi, Mohamed Mohamed (2021-06-30)
    Lake Manzalah one of the northern Nile Delta in Egypt is the largest lake, which lies ‎between the lakes Borollus and Bardaweel and connects to the Mediterranean Sea. It ‎has an area of current 250 thousand acres. It contains many islands particularly along ‎the south-western region forming of semi-enclosed basins and it is characterized by dense ‎submerged hydrophytes as Pomatogeton pectinals; Ceratophyllum demersum and ‎floating hyacinth Eichhornia crassipes. Seven major drains are loading directly in the ‎south to the west. Lake Manzalah-bottomed shallow (0.5-1m), brackish water (3-18‰ ‎and is suffering from the phenomenon of high nutrition (eutrophication) due to increased ‎rates of nutrients and organic matter. So some sources of wastes discharges such as ‎sewage and industrial waste and agricultural activity pour directly into the lake, ‎especially the southern region (Bahr El Baqar Drain). The study aims to study the ‎distribution of benthic organisms in the lake and knowledge of the relationship between ‎the types and aggregates benthic food ecosystem as the important food sources' for ‎some aquatic organisms, especially economic fish and crustaceans in study stations. ‎Bottom sediment samples were collected from 11 sites by grab sampler covering ‎different environments lake and from 4 drains consists mostly of organic materials ‎‎(sludge) is made up of waste sewage, industrial, agricultural waste plants, and calcareous ‎shells empty. Results indicate for examining configuration qualitative macro benthic ‎recording the 16 species of aquatic plants and invertebrates where empty calcareous ‎shells were more frequent. The abundance of macrobenthic organisms at different ‎sampling sites along Lake Manzala can be ranked as follows: Ostracoda (45.4%, 1010 ‎ind/m2) > submerged plants (12.9%, 287 tufts/m2) > Amphipoda (9.2%, 207 ind ∕m2) > ‎Polychaetes (7%, 110 ind ∕m2) Bivalves (5.9%, 132 ind ∕m2). The biomass of benthic ‎assemblages at different sampling sites can also be ranked as follows: at ST5 (18.1%, ‎‎4433 ind ∕m2) > St6 (11.3%, 2772 ind ∕m2) > ST8 (9.8%, 2405 ind ∕m2) > ST3 (9.2%, 2247) ‎‎> ST7 (8.7%, 2122 ind ∕m2). The biomass of benthic assemblages at different sampling ‎sites can also be ranked as follows: echinoderms (52%) > molluscs (27%) > crustaceans ‎‎(16%) > polychaetes (2%) > other groups (3%). Due to the increase of pollutants ‎extensively loaded into the drains are the possible factors having affecting the ‎constituents’ structures of benthos. Sites of sampling study were evenly spread (J’ > 0.8) ‎only at sites 6 and 8, moderate diversity (H’ > 1.00) was at most sites and show lower ‎value at sites 3 and 11 and 0 at site 1. The abiotic environmental effects in the lake are ‎general to those generally observed in other areas influenced by organic wastes, namely, ‎changes in the physic-chemical properties of the sediments and low oxygen ‎concentrations in the bottom water due to the decomposition of organic materials.‎
  • Growth and dispersal of razor clam Solen dactylus in the mudflats of Indus Delta, Sindh ‎Coast (Northern Arabian Sea)‎.

    Pirzado, A.A.; Mahar, M.A. (2021-06-30)
    The Razor clam Solen dactylus is being harvested for the last 10 years from mudflats in ‎creeks of district Thatta. The results of water and soil quality samples indicate the ‎suitability and support for growth, dispersal, production and reproduction of Solen ‎dactylus occurring in Indus delta eco-region. Water quality parameters of creeks ‎indicated the ranges of temperature of water and air 11 to 30 ℃ and 12 to 42℃, pH of ‎water between 8.2 to 8.9, alkalinity of water 267 to 480 mg/l, hardness of water 620 to ‎‎1150 mg/l, salinity of water from 22 to 33 ppt. The soil samples of mudflats indicated silt ‎clay 15 to 30%, sandy clay 20 to 40% and fine sand 30 to 40%. Spring, summer and ‎early winter seasons are suitable timing for harvesting razor clam. However, winter cold ‎and rainy seasons are not suitable for razor clam fishing. In winter, the animals become ‎inactive and remain in deep barrows and do not come to the surface. In period of rainfall ‎the razor clam holes were filled with fine silt thus large number of razor clam were ‎affected and even deaths may have been caused if mudflats were exposed at the time ‎of rain. ‎ The recorded mature size of razor clam ranged between length of 6 to 3.5 cm and weight ‎‎12 to 40 grams. A trained person dig-out 1.5 to 3 kg of razor clam in 12meter square in ‎‎20-40 minutes. Thus a person can exploit 10-20 kg of razor clam in a period of 3- 4 ‎hours, hence 15 - 20 kg of live razor clam can be harvested in a day or night by a person ‎when mudflat become exposed after tidal action. Coastal communities inhabiting creek ‎areas are engaged in its harvesting using traditional techniques of using salt and probing ‎with thin sticks and hauling razor clams from burrow during low tides when mudflats ‎become exposed. It is concluded that Razor clam is an ecologically important group of ‎marine organism, lives in mudflats and creek systems. Although the razor clams are not ‎locally consumed by native people of Pakistan but it is a fishery having export value ‎which foreign exchange earned by exporting it to South East Asian countries.‎
  • Investigation of Haemogregarina in Sawrow fish (Trachurus mediterraneus) in Zliten ‎coastal area, Libya

    Ahmed, Samia H.; Yousif, Ramzy A.; Eldehidya, Radwan; Elaakary, Salim (2021-06-30)
    This study was conducted to estimate the prevalence, mean abundance, and mean ‎intensity of Haemogregarina infection on Sawrow fish (Trachurus mediterraneus) from ‎Zliten coast, Libya. A total of 12 specimens of Sawrow fish species were collected ‎randomly, the length (19.23 ± 0.72cm) and the weight (110.25 ± 7.88 g). The fish were ‎transported immediately alive to the laboratory in the Department of Fish Biology and ‎Fish Culture, College of Marine Resources, Asmarya University, where they were ‎maintained alive in well aerated glass aquaria (1x2x4 m). The gills, fins, and skin were ‎examined for ectoparasitic protozoa using a light microscope. The results showed ‎positive effect of haemogregarina in the Sawrow. Blood recorded the highest prevalence ‎and abundance among all the other organs in Sawrow fish followed by kideny, liver and ‎spleen respectively. The results provide a significant difference at (p<0.01), and the ‎results were discussed with other studies in the haemogregarinidae.‎
  • Form factor of Japanese threadfin bream, Nemipterus japonicus (Bloch, 1791).‎

    Rahman, Md. Ashekur; Ohtomi, Jun (2021-06-30)
    Japanese threadfin bream, Nemipterus japonicus is a large-scale commercial fish found ‎in the Pacific and Indian Ocean. Form factor (a3.0) is used widely for comparison of the ‎fish body shape between geographic locations. The present study was aimed to estimate ‎the form factor of N. Japonicus from available literature based on empirical model. ‎Assessed a3.0 ranged from 0.0035 to 0.0270. The median (0.0143) and 95% confidence ‎limit (0.0130-0.0168) indicated that N. Japonicas poses the typical torpedo body shape ‎‎‘fusiform’. Findings on the form factor of N. japonicus will be effective for perceiving ‎further body shape alteration between geographic distributions.‎
  • Authentication and traceability of pufferfish species using DNA sequencing.

    Doğdu ‎, Servet Ahmet; Turan, Cemal (2021-06-30)
    Pufferfish is known a powerful toxin in its skin and organs called Tetrodotoxin. ‎Validation of food authenticity is usually based on the analysis of proteins or DNA ‎sequences. DNA based methods are more effective and can also be applied to different ‎food matrices. DNA barcoding is a rapidly rising global initiative in which species are ‎characterized using mtDNA sequences. This is based on the premise that species are ‎generally well delineated by a species-specific sequence. In this study, we revealed DNA ‎barcoding of three pufferfish species Lagocephalus sceleratus, Sphoeroides pachygaster ‎and Torquigener flavimaculosus using the mtDNA cytochrome b gene region. There were ‎‎122 variables and 266 conservative nucleotides of which 110 were parsimony ‎informative over 388 bp sequences. The mean nucleotides composition was found as ‎‎%28.0 thymine (T), %30.7 cytosine (C), %24.8 adenine (A) and %16.6 guanine (G). ‎Twelve haplotypes were found out of 18 sequences and mean haplotype diversity was ‎observed at 0.9346. This study has strongly authenticated and traceability the efficacy ‎of Cty b in identifying L. sceleratus, S. pachygaster and T. flavimaculosus species with ‎designated barcodes. This is the recorded of L. sceleratus, S. pachygaster and T. ‎flavimaculosus cytochrome b gene sequence from the eastern Mediterranean coast of ‎Turkey.‎
  • Sex ratios of Metapenaeus kutchensis George, George and Rao, 1963 and Parapenaeopsis sculptilis (Heller, 1862) in the Gulf of Kachchh, Western India.

    Pravez, Rishad; Krishnan, Smita; Mansuri, A.P. (1992-06-30)
    Sex ratio data of two species of penaeid prawns Metapenaeus kutchensis George, George and Rao, ‎‎1963 and Parapenaeopsis sculptilis (Heller, 1862), occurring in the Gulf of Kachchh, were ‎statistically analyzed. A preponderance of females was observed in both the species and the ratio ‎of male to female for both years combined for M. kutchensis and P. sculptilis was found to be ‎‎1:1.5 and 1:2.7, respectively. Chi-square analysis revealed significant difference in the sex ratios of ‎the two species.‎
  • Re-description of Lupocyclus philippinensis (Crustacea: Decapoda: Brachyura: ‎Portunidae) Semper in Nauck, 1880 from the coastal waters of Karachi, Pakistan.‎

    Naz, Farah; Saher, Noor Us; Osmani, Hamid Badar (2019-12-31)
    A specimen of the Lupocyclus philippinensis Semper in Nauck, 1880 commonly known ‎as scissor swimming crab, was recently found in by catch of shrimp trawling and ‎included as part of continuous taxonomic studies on crabs found in the coastal waters of ‎Pakistan. The discovery is significant because it found after a long time. Redescription of ‎L. philippinensis following the discovery of a female caught at Karachi fish harbor, ‎Pakistan by Leene and Buitendijk (1952).‎
  • Community structure and seasonal distribution of intertidal macrofauna from two rocky ‎shores of Karachi coast.

    Ali, Qadeer Mohammad; Ghory‎, Farhana S.; Ahmed, Quratulan; Siddique, Saima; Mubarak, Shumaila; Memon, Sehrish (2019-12-31)
    Rocky shores are considered heterogeneous environments due to their composition and ‎structure. Therefore, they support numerous habitats for flora and fauna. Organisms ‎found on rocky shores are facing intense physicochemical conditions during tidal ‎changes from upper to lower intertidal zones. Total (N=1888) specimens were collected ‎on seasonal basis from intertidal zone during low tide from two rocky sites of Karachi ‎coast, Buleji and Sunehri during January 2017 to December 2017. The highest number ‎of individuals (N=1041), were recorded from Buleji than Sunehri (N= 847). The seasonal ‎abundance in Mollusca were measured as (36.84%), (63.67%), (25.08) and (40.38%) ‎from Buleji while from Sunehri (45.16 %), (46.01%), (48.65) and (42.79 %) during pre-‎monsoon, south-west monsoon, post monsoon and north-east monsoon season ‎respectively. Group Arthropoda, Mollusca and Echinodermata were shows the highest ‎abundance of the species at both sites as compare to other groups. The highest diversity ‎index from Sunehri (H'=0.64) was measured in north-east monsoon season meanwhile, ‎‎(H'=0.61) was measured in post monsoon season from Buleji coast. Evenness index ‎‎(J'=0.25) in pre-monsoon season from Buleji and (J'=0.28) in south-west monsoon season ‎from Sunehri coast . Season shows the great abundance of species as compare to other ‎seasons. No significant correlation was observed in between seasons, water temperature ‎and salinity with macrofauna groups at both sites. ‎

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