Dynamics of the Confluence of Malvinas and Brazil currents, and a southern Patagonian spawning ground, explain recruitment fluctuations of the main stock of Illex argentinus

2020 ◽  
Author(s):  
María Luz Torres Alberto ◽  
Nicolás Bodnariuk ◽  
Marcela Ivanovic ◽  
Martín Saraceno ◽  
Eduardo Marcelo Acha
Keyword(s):  
Spawning Ground ◽  
Illex Argentinus

From continuous to occasional: Small-scale natural reproduction of Chinese sturgeon occured in the Gezhouba spawning ground, Yichang, China

2017 ◽  
Vol 24 (3) ◽  
pp. 425 ◽  
Author(s):  
Jinming WU ◽  
Chengyou WANG ◽  
Shuhuan ZHANG ◽  
Hui ZHANG ◽  
Hao DU ◽  
...  
Keyword(s):  
Small Scale ◽  
Spawning Ground ◽  
Chinese Sturgeon ◽  
Natural Reproduction

scholarly journals Optimization of the flow conditions in the spawning ground of the Chinese sturgeon (Acipenser sinensis) through Gezhouba Dam generating units

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Anyang Huang ◽  
Jinzhong Yao ◽  
Jiazhi Zhu ◽  
Xingchen Gao ◽  
Wei Jiang
Keyword(s):  
Spawning Ground ◽  
Chinese Sturgeon ◽  
Flow Conditions ◽  
Velocity Measurements ◽  
Acipenser Sinensis ◽  
Critically Endangered Species ◽  
Gezhouba Dam ◽  
Opening Mode ◽  
Suitable Area ◽  
Good Agreement

AbstractChinese sturgeon (Acipenser sinensis) is a critically endangered species, and waters downstream from Gezhouba Dam are the only known spawning ground. To optimize the velocity conditions in the spawning ground by controlling the opening mode of Gezhouba Dam generator units, a mathematical model of Chinese sturgeon spawning ground was established in FLOW-3D. The model was evaluated with velocity measurements, and the results were determined to be in good agreement. By inverting the 2016–2019 field monitoring results, the model shows that the preferred velocity range for Chinese sturgeon spawning is 0.6–1.5 m/s. Velocity fields of different opening modes of the generator units were simulated with identical discharge. The suitable-velocity area was maximal when all units of Dajiang Plant of Gezhouba Dam were open. For discharges below 12,000 m3/s, most of the area was suitable; for discharges above 12,000 m3/s, the suitable area rapidly decreased with increasing discharge. A comparison of suitable areas under high-flow showed that at discharges of 12,000–15,000 m3/s, opening 11–13 units on the left side was optimal. For discharges above 15,000 m3/s, all units should be open. We used these results to recommend a new operation scheme to support the conservation of Chinese sturgeon.

scholarly journals Does construction in the spawning ground improve the riverbed conditions making it suitable for spawning of the Ryukyu-ayu Plecoglossus altivelis ryukyuensis?

2020 ◽  
Vol 67 (4) ◽  
pp. 493-501
Author(s):  
Satoshi Awata ◽  
Tetsuya Tsuruta ◽  
Shin-ichiro Abe ◽  
Toshihiko Yonezawa ◽  
Kei’ichiro Iguchi
Keyword(s):  
Spawning Ground ◽  
Plecoglossus Altivelis ◽  
Plecoglossus Altivelis Ryukyuensis

scholarly journals The spawning ground of the Japanese mantis shrimp Oratosquilla oratoria in Tokyo Bay, Japan.

1991 ◽  
Vol 57 (3) ◽  
pp. 447-451 ◽  
Author(s):  
Jun Ohtomi ◽  
Makoto Shimizu
Keyword(s):  
Tokyo Bay ◽  
Spawning Ground ◽  
Mantis Shrimp ◽  
Oratosquilla Oratoria

Spawning ground and larval transport processes of jack mackerel Trachurus japonicus in the shelf-break region of the southern East China Sea

2008 ◽  
Vol 28 (18) ◽  
pp. 2574-2583 ◽  
Author(s):  
Chiyuki Sassa ◽  
Youichi Tsukamoto ◽  
Kou Nishiuchi ◽  
Yoshinobu Konishi
Keyword(s):  
East China Sea ◽  
Transport Processes ◽  
Shelf Break ◽  
Larval Transport ◽  
East China ◽  
Spawning Ground ◽  
Jack Mackerel ◽  
Trachurus Japonicus ◽  
Southern East China Sea ◽  
Break Region

Projecting distributions of Argentine shortfin squid (Illex argentinus) in the Southwest Atlantic using a complex integrated model

2018 ◽  
Vol 37 (8) ◽  
pp. 31-37 ◽  
Author(s):  
Jintao Wang ◽  
Xinjun Chen ◽  
Yong Chen
Keyword(s):  
Integrated Model ◽  
Southwest Atlantic ◽  
Illex Argentinus

Where is disciplinarity going? Meeting on the borderland

2011 ◽  
Vol 50 (3-4) ◽  
pp. 582-606 ◽  
Author(s):  
Anne Marcovich ◽  
Terry Shinn
Keyword(s):  
19Th Century ◽  
Scientific Knowledge ◽  
Scientific Discipline ◽  
Cognitive Structures ◽  
Spawning Ground ◽  
University System ◽  
The 19Th Century

This article analyzes the cognitive structures and dynamics of a form of scientific discipline that differs importantly both from the disciplinary format of the 19th-century university system, and from the profile proposed by much postmodern interdisciplinary (anti-disciplinary) discussion. This recent form of discipline, here termed the ‘new disciplinarity’, is a product of the increasing complexity of scientific knowledge and activity. The approach privileges cognition. It emphasizes the concepts of disciplinary referent, robust boundaries, ‘borderland’, combinatorials and projects. It suggests that the new disciplinarity is highly elastic and that it is a spawning-ground for new disciplines.

Food and feeding of the short-finned squid Illex argentinus (Cephalopoda: Ommastrephidae) off southern Brazil

1997 ◽  
Vol 33 (1-3) ◽  
pp. 139-147 ◽  
Author(s):  
Roberta Aguiar Santos ◽  
Manuel Haimovici
Keyword(s):  
Southern Brazil ◽  
Food And Feeding ◽  
Illex Argentinus
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