SEAFDEC Aquaculture Department Quarterly Research Report
http://hdl.handle.net/1834/17871
2024-03-28T08:52:14ZCatch composition of penaeid prawns caught with fish corrals at Batan Bay, Philippines
http://hdl.handle.net/1834/34139
Catch composition of penaeid prawns caught with fish corrals at Batan Bay, Philippines
Motoh, Hiroshi; Solis, Noel; Caligdong, Edna
The study was undertaken to ascertain the commercially important species of penaeid prawns caught in Batan Bay, Philippines and their abundance in fish corrals. A total of 12 species were commercially caught: Penaeus monodon, P. semisulcatus, P. merguiensis, P. indicus, P. latisulcatus, P. japonicus, P. canaliculatus, Metapenaeus ensis, M. endeavouri, M. dalli, M. elegans, and Trachypenaeus fulvus.
1979-01-01T00:00:00ZSurvival, maturation, fecundity and hatching rates of unablated and ablated Penaeus indicus H.M. Edwards from brackishwater ponds
http://hdl.handle.net/1834/34138
Survival, maturation, fecundity and hatching rates of unablated and ablated Penaeus indicus H.M. Edwards from brackishwater ponds
Primavera, Jurgenne H.; Young, Thomas; de los Reyes, Carol
Penaeus indicus harvested after three months of rearing in brackishwater ponds and averaging 6.9 g for females and 5.6 g for males were stocked in two 12 cu m flowthrough ferrocement tanks at 240 females and 200 males per tank. The females were ablated on one eyestalk in one tank and remained unablated in the other tank; all males were unablated. Ablated females spawned up to 7 times per female; unablated females spawned up to only 3 times during the two month duration of the experiment. Ablated females produced a total number of 17.5 x 10<sup>6</sup> eggs, 6.6 x 10<sup>6</sup> nauplii, and an average of 23,480 eggs/spawning and 37.8% hatching rate from a total of 757 spawnings. Unablated females produced a total of 2.0 x 10<sup>6</sup> eggs, 1.1 x 10<sup>6</sup> nauplii, and an average of 26.990 eggs/spawning and 53.9% hatching rate from a total of 74 spawnings. Survival of ablated females was 53.5% compared to 69.4% for unablated females; males in both tanks averaged more than 90% survival.
1979-01-01T00:00:00ZStudies on the fungal diseases in crustaceans. I. Lagenidum scyllae sp. nov. isolated from cultivated ova and larvae of the mangrove crab (Scylla serrata)
http://hdl.handle.net/1834/34137
Studies on the fungal diseases in crustaceans. I. Lagenidum scyllae sp. nov. isolated from cultivated ova and larvae of the mangrove crab (Scylla serrata)
Bian, Bo Zhong; Hatai, Kishio; Po, Gilda; Egusa, Syuzo
Lagenidium scyllae , a marine mastigomycete from the ova and larvae of the mangrove crab, is described and illustrated as new. The fungus grew at a temperature range of 16-42 C, with an optimum at 22.5-31.8 C. It grew well in peptone-yeast-glucose (PYG) broth containing 2-3% NaCl. In PYG-sea water medium, it grew at a pH range of 5-11.
1979-01-01T00:00:00ZThe extraction of mimosine from ipil-ipil (Leucaena leucocephala) by soaking in water
http://hdl.handle.net/1834/34135
The extraction of mimosine from ipil-ipil (Leucaena leucocephala) by soaking in water
Pascual, Felicitas; PeƱaflorida, Veronica
The study aimed to find a cheap and practical method of extracting mimosine from Leucaena leucocephala, otherwise known as ipil-ipil in the Philippines. L. leucocephala leaves are used in cattle, poultry and swine feed and have been tried as a food ingredient in some fish diets. While it contains relatively high amount of protein, its use as feed has been limited because of the presence of toxic substance, mimosine. Findings revealed that soaking the leaves in water was highly efficient for the extraction of mimosine, the longer the duration of soaking the more mimosine was extracted. On the other hand, 87 % of the juveniles Penaeus monodon fed with diets containing L. leucocephala leaves soaked for 24 hours survived, much higher compared to those that were fed with unsoaked leaves for eight weeks.
1979-01-01T00:00:00Z