Age, growth, reproductive biology and mortality of Cranoglanis multiradiatus , a threatened freshwater fish in Hainan Island, China

2021 ◽  
Author(s):  
Fei Liu ◽  
Edwine Yongo ◽  
Zhice Liang ◽  
Qiongyao Fu ◽  
Bo Huang ◽  
...  
Keyword(s):  
Freshwater Fish ◽  
Reproductive Biology ◽  
Hainan Island

Length‐weight relationships of three freshwater fish species from the Nandu River and Changhua River in Hainan Island, China

2018 ◽  
Vol 35 (2) ◽  
pp. 580-581 ◽  
Author(s):  
Xingwei Cai ◽  
Gaojun Li ◽  
Fangyuan Li ◽  
Haigui Wang ◽  
Ya Zhang ◽  
...  
Keyword(s):  
Freshwater Fish ◽  
Fish Species ◽  
Hainan Island ◽  
Freshwater Fish Species

scholarly journals Factors influencing tropical Island freshwater fishes: species, status, threats and conservation in Hainan Island

2018 ◽  
pp. 6 ◽  
Author(s):  
Wen Xiong ◽  
Qiang Wang ◽  
Dong Xie ◽  
David H Fletcher ◽  
Dekui He
Keyword(s):  
Freshwater Fish ◽  
Native Species ◽  
Habitat Degradation ◽  
Current Knowledge ◽  
Fish Fauna ◽  
Hainan Island ◽  
Freshwater Fishes ◽  
Flow Modification ◽  
Fish Biodiversity ◽  
Freshwater Fish Fauna

Hainan Island is located within the Indo-Burma global biodiversity hotspot, however, the freshwater fish fauna on this island is poorly understood. Based on field investigations and literature review, we compiled a list of 154 freshwater fish species (138 native and 16 non-native) belonging to 10 orders, 31 families and 104 genera found on Hainan Island. Of these, 31 species are endemic to China. The native freshwater fish fauna in Hainan Island is affiliated to South China sub-region of the Oriental Region. Current knowledge suggests that overexploitation, water pollution, flow modification, habitat degradation, and non-native species have severely reduced the freshwater fish biodiversity in Hainan Island. To protect freshwater fish biodiversity and fisheries in Hainan Island, some new measures should be adopted and current measures better enforced. This study constitutes an important resource for conservation management of freshwater fishes in Hainan Island.

Population structure and reproductive biology of a freshwater fish, Labeo boggut (Sykes, 1839), from two perennial rivers of Yamuna basin

2011 ◽  
Vol 28 (1) ◽  
pp. 107-115 ◽  
Author(s):  
U. K. Sarkar ◽  
R. S. Kumar ◽  
V. K. Dubey ◽  
A. Pandey ◽  
W. S. Lakra
Keyword(s):  
Population Structure ◽  
Freshwater Fish ◽  
Reproductive Biology

scholarly journals Reproductive Biology of Neotropical Fishes: A Guide to Identification to the Gonadal Morphology During the Reproductive Cycle of Catfish Rhamdia quelen (Siluriformes: Heptapteridae)

2020 ◽  
Vol 8 (2) ◽  
pp. 15
Author(s):  
Talita Sarah Mazzoni ◽  
Robie Allan Bombardelli ◽  
Irani Quagio-Grassiotto
Keyword(s):  
Freshwater Fish ◽  
Reproductive Biology ◽  
Morphological Characteristics ◽  
Fish Reproduction ◽  
Recent Proposal ◽  
Neotropical Fishes ◽  
Rhamdia Quelen ◽  
Reproductive Cycles ◽  
Reproductive Phases

In most Teleostei fish, the gametogenesis is a cyclical and seasonal event. The renewal of gametes, through their differentiation, development, maturation and release causes several changes in the morphological characteristics of the ovaries and testes throughout the annual reproductive cycles. These alterations are used to recognize different phases in the reproductive cycles. However, as the number of studies of fish reproduction increased, the number of types of gonadal classification and nomenclatures also diversified. This may make it difficult to communication between researchers and the aquaculture activity, since the recognition of these phases is one of the most important parameters applied in the management of fishery resources. In addition, the terminologies proposed in most of the current studies refer to reproductive stages applicable to marine fish, with marked and defined seasonality characteristics. In this way, this report presents a recent proposal for the recognition of reproductive phases originally developed for the Perciformes and here adapted for the Neotropical Siluriformes, using as a biological model a freshwater catfish Rhamdia quelen. In addition, we describe a brief characterization of the gametogenesis in this species. We hope that the material presented can be used as an easy and practical guide of identification for reproductive phases applicable to other neotropical freshwater fish, more especially Otophysi, such as Siluriformes.

Fine structure and possible functions of the hermaphrodite duct of some pulmonate snails (Mollusca: Gastropoda)

1990 ◽  
Vol 48 (3) ◽  
pp. 68-69
Author(s):  
Alan N. Hodgson
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Fine Structure ◽  
Seminal Vesicle ◽  
Reproductive Biology ◽  
Light Microscope ◽  
Light Microscope Level ◽  
Transmission Electron ◽  
Standard Techniques

The hermaphrodite duct of pulmonate snails connects the ovotestis to the fertilization pouch. The duct is typically divided into three zones; aproximal duct which leaves the ovotestis, the middle duct (seminal vesicle) and the distal ovotestis duct. The seminal vesicle forms the major portion of the duct and is thought to store sperm prior to copulation. In addition the duct may also play a role in sperm maturation and degredation. Although the structure of the seminal vesicle has been described for a number of snails at the light microscope level there appear to be only two descriptions of the ultrastructure of this tissue. Clearly if the role of the hermaphrodite duct in the reproductive biology of pulmonatesis to be understood, knowledge of its fine structure is required.Hermaphrodite ducts, both containing and lacking sperm, of species of the terrestrial pulmonate genera Sphincterochila, Levantina, and Helix and the marine pulmonate genus Siphonaria were prepared for transmission electron microscopy by standard techniques.

Morphology, classification, and reproductive biology ofVigna unguiculata (L.) Walpers (Papilionaceae) in Nigeria

1989 ◽  
Vol 100 (3-4) ◽  
pp. 137-145
Author(s):  
R. E. Ugborogho ◽  
C. O. Agomo
Keyword(s):  
Reproductive Biology

Classification and host specificity of Metagonimus spp. from Korean freshwater fish

1996 ◽  
Vol 34 (1) ◽  
pp. 7 ◽  
Author(s):  
H J Rim ◽  
K H Kim ◽  
K H Joo
Keyword(s):  
Freshwater Fish ◽  
Host Specificity
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