Uroteuthis chinensis - Mitre Squid (Gray 1849)

DWhatley

Cthulhu
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Length–weight relationships of the tropical cephalopod Uroteuthis chinensis (Gray, 1849) from Sabah, Malaysia
Mohammad Abdul Momin Siddique, Aziz Arshad, S.M. Nurul Amin 2014 (subscription)

Abstract
This study focuses on the length–weight relationships (LWR) and the relative condition factor (Kn) of Uroteuthis chinensis from the Marudu Bay, Malaysia. The mean mantle length (±SE) and the total body weight (±SE) of U. chinensis were 29.02 ± 1.31 mm and 3.37 ± 0.46 g, respectively. The calculated growth coefficient b was 2.579, which indicated the hypoallometric growth of the animals from the study area. The study also showed that the dorsal mantle length and the total body weight were highly correlated (r = 0.930, p < 0.001). The mean values of the relative condition factor (Kn) of U. chinensis were found to be 1.0062 ± 0.1134. To our knowledge, the LWR and condition indices of U. chinensis collected from the Marudu Bay presented herein represent the first reference available to Malaysian waters.
 

DWhatley

Cthulhu
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#2
Biological Characteristics and Spatial—Temporal Distribution of Mitre Squid, Uroteuthis Chinensis, in the Beibu Gulf, South China Sea
Yan Yunrong , Li Yuyuan , Yang Shengyun ,Wu Guirong ,Tao Yajin ,Feng Qibin, Lu Huosheng 2013

ABSTRACT
Based on seasonal sampling in the Beibu Gulf (Tonkin Gulf), South China Sea, from August 2010 to May 2011, biological characteristics such as growth, reproduction, and ingestion of 2,179 mitre squid, Uroteuthis chinensis, were investigated. The results showed that the maximum and minimum mantle lengths of U. chinensis were 438 mm and 49 mm, respectively, whereas the corresponding body weights were 723 g and 7.3 g, respectively. Both mantle length and body weight peaked in spring. The relationship between mantle length (L, in millimeters) and body weight (W, in grams) was W = 1.43 × 10-3 × L2.19 (R 2 = 0.92), and between mantle length and gutted weight (W, in grams) was W = 1.04 × 10-3 × L2.24 (R 2 = 0.97). The number of females was equal to that ofmales, with a sex ratio of 1:1.01. Furthermore, no obvious seasonal change was observed. There was no stage VI of gonad maturation, and stage I was dominant year-round. The feeding intensity was low and the empty stomach rate was high throughout the year. The mean trophic levels from spring to winter were 3.6, 2.7, 3.0, and 3.3, respectively. The results indicated considerable differences in the sampling areas. In addition, seasonal changes in catch and distribution were observable whereas biomass varied greatly.
 

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