Deep-Water Japanese Blunthorn Lobster Palinustus waguensis Kubo, 1963: First Estimates of Life History Parameters from the Southwest Coast of India

Chakraborty, Rekha D and Maheswarudu, G and Aneesa, K A and Sreesanth, L and Ragesh, N (2021) Deep-Water Japanese Blunthorn Lobster Palinustus waguensis Kubo, 1963: First Estimates of Life History Parameters from the Southwest Coast of India. Asian Fisheries Science, 34 (4). pp. 326-335.

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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 length-weight 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, r2 > 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 (Lm50) 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.

    Item Type: Article
    Uncontrolled Keywords: length weight relationship; berried; gut contents; fecundity
    Subjects: Crustacean Fisheries
    Crustacean Fisheries > Lobsters
    Divisions: CMFRI-Kochi > Marine Capture > Crustacean Fisheries
    Subject Area > CMFRI > CMFRI-Kochi > Marine Capture > Crustacean Fisheries
    CMFRI-Kochi > Marine Capture > Crustacean Fisheries
    Subject Area > CMFRI-Kochi > Marine Capture > Crustacean Fisheries
    Depositing User: Arun Surendran
    Date Deposited: 18 Jan 2022 06:36
    Last Modified: 30 Jun 2022 10:02
    URI: http://eprints.cmfri.org.in/id/eprint/15692

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