Iranian Journal of Fisheries Sciences
مجله علوم شیلاتی ایران
IJFS
Agriculture
http://jifro.ir
1
admin
1562-2916
10.18869/acadpub.ijfs
en
jalali
1401
2
1
gregorian
2022
5
1
21
3
online
1
fulltext
en
Short communication: Beak length analysis for the identification of two morphologically similar species common names Uroteuthis edulis (Hoyle, 1885) and Uroteuthis duvaucelii (D'Orbigny, 1835) (Cephalopoda: Loliginidae) in the southern East China Sea
Biology & physiology
Biology & physiology
پژوهشي
Orginal research papers
<p>In this study, beak length characteristics were described and used to predict the individual size and separate 2 morphologically similar species of the family Loliginidae: Uroteuthis edulis and Uroteuthis duvauceli. The samples were collected using bottom trawl methods in May, September and December from the southern East China Sea in 2015. The data presented here indicates that identification was possible with a high accuracy using various ratios of beak lengths indices. Differences were observed among various length indices and the corresponding ratios. Also, the beak length indices were affected presumably due to the individual growth of each specimen. Additionally, relationships between a durable beak measurement versus both mantle length (ML) and body weight (BW) were studied. Rostral length (RL) linearly increased with ML and BW. The beak lengths did not change with the fluctuation of the ML. Significant differences (P < 0.05) were observed between 5 upper beak ratios and 6 lower beak ratios. The data presented here indicated that beak ratios could be used as a variable to identify the two species in a stepwise discriminant analysis. Additionally, linear discriminant functions of upper and lower beak morphological variables were developed for the two loliginids. The data presented here indicate results that have a high level of correctness in species classification.</p>
Beak, Morphology, Uroteuthis edulis, Uroteuthis duvaucelii, East China Sea
859
863
http://jifro.ir/browse.php?a_code=A-10-2546-1&slc_lang=en&sid=1
L.L.
Yang
seasun107@126.com
100319475328460046412
100319475328460046412
No
East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences
Y.Z.
Jiang
yazhoujiang@163.com
100319475328460046413
100319475328460046413
No
East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences
Z.L.
Liu
liuzl@ecsf.ac.cn
100319475328460046414
100319475328460046414
No
East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences
S.F.
Li
lisf@eastfishery.ac.cn
100319475328460046415
100319475328460046415
Yes
East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences