Length-weight relationships of three schizothoracinae fish species from the Niyang River, a branch of the Yarlung Zangbo River, Tibet, China

2016 ◽  
Vol 32 (5) ◽  
pp. 982-985 ◽  
Author(s):  
H. P. Liu ◽  
S. W. Ye ◽  
Z. J. Li
2016 ◽  
Vol 32 (6) ◽  
pp. 1313-1314
Author(s):  
L. Li ◽  
B. Ma ◽  
J.-L. Wang ◽  
C. Zhang ◽  
J.-H. Gong

2016 ◽  
Vol 32 (6) ◽  
pp. 1320-1321 ◽  
Author(s):  
J. Wang ◽  
F. Liu ◽  
Z. Gong ◽  
P.-C. Lin ◽  
H.-Z. Liu ◽  
...  

2016 ◽  
Vol 32 (6) ◽  
pp. 1298-1299 ◽  
Author(s):  
Y. J. Duan ◽  
B. S. Ma ◽  
X. Yang ◽  
C. X. Xie ◽  
B. Huo

<em>Abstract</em>.—A total of 13 alien fish species were introduced to the middle reaches of the Yarlung Zangbo River with the development of aquaculture in recent years. Eight of these species now have established populations and five have not established. To explore the mechanism for alien fish species establishment in this river, we compiled 23 biological traits of those species and tested for differences in biological trait and ecological niche between the established and nonestablished fish species. The trait analysis results showed that successfully established fish species have smaller body length, smaller egg diameter, earlier sexual maturity, and wider diet breadth than the nonestablished species. Ecological niches between established and nonestablished fish species also differed significantly. Our results support the vacant niche hypothesis that the successfully established species could occupy the vacant niches in the introduced range. We also used a model to predict the invasion risk of 27 potentially introduced fish species in the middle reaches of the Yarlung Zangbo River. The model predicted that there was a higher risk of establishment for 15 of the 27 species.


2018 ◽  
Vol 34 (4) ◽  
pp. 1009-1010
Author(s):  
C. Zhang ◽  
T. B. Zhu ◽  
C. W. Zhou ◽  
Y. Z. Pan ◽  
F. Liu ◽  
...  

2017 ◽  
Vol 33 (6) ◽  
pp. 1310-1311
Author(s):  
C. Zhang ◽  
H. P. Liu ◽  
Z. B. Mou ◽  
B. Ma ◽  
C. W. Zhou ◽  
...  

2020 ◽  
Vol 33 ◽  
pp. 15
Author(s):  
Roi Martínez-Escauriaza ◽  
Claudio Vieira ◽  
Lídia Gouveia ◽  
Nuno Gouveia ◽  
Margarida Hermida

Data obtained from licenses of spearfishers and surveys conducted in 2004 and 2017 allowed for the analysis, for the first time, of the practice of spearfishing in the Madeira archipelago. Only a small percentage of the population practices spearfishing, mostly local young men. Most of them practice the activity with a partner throughout most of the year and along most of the island's coastal areas, although preferentially along the North and Southeast coast. Results show how, in recent years, despite the population of spearfishers decreasing, the abundance in the annual catch potentially increased, probably due to the higher investment of time in this activity. It has been observed that many fishers complement their catches with manual collecting of invertebrates. Overall, 40 teleost fishes and also 4 crustaceans and 8 molluscs were identified. The most frequently captured fish species were parrotfish and white seabream, while limpets were the most collected invertebrates in both selected periods.


Consumers all over the world are increasingly becoming aware of the health and nutrition status of fish and fishery products. There have develop some preference for fish species and even their processing methods. This study aims to investigate the effects of two drying methods (smoking and oven drying) on the biochemical components and organoleptic properties of two less preferred food fishes abundant in the study area. The fish samples Mormyrus rume and Labeo coubie were purchased from fresh landings of fishermen at Ahaha beach. The biochemical assay of the moisture, protein, fat, carbohydrate, ash, calcium (Ca), magnesium (Mg), phosphorus (P), iron (Fe), sodium (Na) and potassium (K) were conducted in the labouratory using standard methods. The proximate composition of raw M. rume was determined as moisture 70.38%, protein 17.43%, carbohydrate 1.13%, fat 5.93% and ash 2.77% while oven dried were 18.78, 63.85, 3.37, 8.73 and 7.58% respectively. All the proximate parameters and gross energy level investigated were higher (p < 0.05) in M. rume except the moisture content of dried samples of L. coubie. The mineral content were in the order Ca < Mg < Fe < Na < P and < K in both species and were higher in M. rume except Na. The drying methods showed increase in the proximate and mineral compositions in the order raw < smoking and < oven drying except moisture content that decreased respectively is both species. Organoleptic properties revealed that dried samples (smoked and oven) were not significantly different (p < 0.05) in taste, flavour, texture and overall acceptance, however while oven dried had better colour (4.33), smoked dried taste (4.63) better. The drying methods shows concentration of the required nutrients in human diets and were also found to be most palatable by the panellist. To improve fish nutrient quality smoke and oven drying should be encourage.


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