Deep-water Japanese blunthorn lobster Palinustus waguensis Kubo 1963: first estimates of life history parameters from the Southwest Coast of India

Sreesanth L., . and Maheswarudu G., . and Ragesh N., . and Chakraborty Rekha Devi, . and Aneesa K. A., . Deep-water Japanese blunthorn lobster Palinustus waguensis Kubo 1963: first estimates of life history parameters from the Southwest Coast of India. pp. 326-335. ISSN 2073-3720

Palinustus waguensis Kubo 1963 is the deep-sea Japanese blunthorn lobster belonging to the Family Palinuridae. It is a species that has been rarely reported living in rocky habitats on deep-reef slopes at a depth of 100“250 m. An estimated catch of 100 kg of P. waguensis consisting of 113 males 54 females and 23 berried lobsters were collected during the first fortnight of January 2019 from the multi-day shrimp trawls operating off Sakthikulangara Kerala India. The mean total length was recorded as 112.3 mm in males 102.6 mm in females. The parameters of the lengthweight relationship were estimated as a 0.041 b 2.84 for males and a 0.05 b 2.86 for females which were not significantly different (P 0.05 r 0.90) between the males and females. The relative condition factor (K) in the males and females of P. waguensis ranged from 2.07“4.96 and 1.87“3.86 respectively attributing to the better feeding efficiency in males. Food and feeding analysis revealed the dietary content as fish (53 ) crab (23.5 ) shrimp (7.8 ) digested matter (11.6 ) and foraminifera (4 ). Feeding intensity analysis about the fullness of the stomach showed the specimens bearing full stomachs (11.3 ) three-fourth full (9.9 ). Length at 50 maturity (Lm‚‚) was 96.9 mm. Gonado-somatic index (GSI) ranged from 3.39 to 8.13. The present study forms the first report on the biology of the deep-water Japanese blunthorn lobster P. waguensis from India.

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Abstract

Palinustus waguensis Kubo 1963 is the deep-sea Japanese blunthorn lobster belonging to the Family Palinuridae. It is a species that has been rarely reported living in rocky habitats on deep-reef slopes at a depth of 100“250 m. An estimated catch of 100 kg of P. waguensis consisting of 113 males 54 females and 23 berried lobsters were collected during the first fortnight of January 2019 from the multi-day shrimp trawls operating off Sakthikulangara Kerala India. The mean total length was recorded as 112.3 mm in males 102.6 mm in females. The parameters of the lengthweight relationship were estimated as a 0.041 b 2.84 for males and a 0.05 b 2.86 for females which were not significantly different (P 0.05 r 0.90) between the males and females. The relative condition factor (K) in the males and females of P. waguensis ranged from 2.07“4.96 and 1.87“3.86 respectively attributing to the better feeding efficiency in males. Food and feeding analysis revealed the dietary content as fish (53 ) crab (23.5 ) shrimp (7.8 ) digested matter (11.6 ) and foraminifera (4 ). Feeding intensity analysis about the fullness of the stomach showed the specimens bearing full stomachs (11.3 ) three-fourth full (9.9 ). Length at 50 maturity (Lm‚‚) was 96.9 mm. Gonado-somatic index (GSI) ranged from 3.39 to 8.13. The present study forms the first report on the biology of the deep-water Japanese blunthorn lobster P. waguensis from India.

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Item Type:	Article
AGROVOC Term:	Lobsters
AGROVOC Term:	Palinuridae
AGROVOC Term:	Fecundity
AGROVOC Term:	Feeding
AGROVOC Term:	Sampling
AGROVOC Term:	Data collection
AGROVOC Term:	analysis
AGROVOC Term:	Population ecology
AGROVOC Term:	Sustainability
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:55
URI:	http://webagris.upm.edu.my/id/eprint/10293

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