Changes in Mesopotamian spiny eel, Mastacembelus mastacembelus (Bank &amp; Solender in Russell, 1794) (Mastacembelidae) milt quality during a spawning period

Şahinöz, Erdinç; Aral, Faruk; Doğu, Zafer

doi:10.1016/j.theriogenology.2006.11.001

Cited by 15 publications

(10 citation statements)

References 47 publications

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“…Spawning of few other endemic Mesopotamian fish have been also studied and successfully induced (Al Hazzaa and Hussein, 2003a, b;Şahinöz et al, 2007), their early life-stages are controlled (Şahinöz et al, 2006;Al Hazzaa and Hussein, 2007) and feeding commercial diets proved efficient (Gökçek et al, 2008;Gökçek and Tepe, 2009). It is possible, after understanding more details on the biology of Mesopotamian endemic asp, to apply advanced techniques for restocking this fish in natural habitats and to introduce it as a new species for aquaculture.…”

Section: Discussionmentioning

confidence: 99%

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Al-Saleh¹,

Hammoud²,

Hussein³

et al. 2012

Turk. J. Fish. Aquat. Sci.

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Endemic asp, Aspius vorax, from the middle section of the Euphrates River flowing through eastern Syria were studied to determine the main characteristics of their population structure, morphological parameters and reproductive biology. Samples ranged between 0+ and 4+ years of age and were dominated by 2+ years old group. Total length (TL) ranged between 19 and 70 cm corresponding with 46 to 2824.5 g weight, respectively. Fish growth has isometric pattern and the overall sex ratio was unbiased. Seasonal changes in the condition factor were related with the water temperature as well as t he spawning season. Annual cycle of gonadosomatic index (GSI) readings indicated that spawning season occur around March when fish longer than 36 cm can mate. Average pre-spawning GSI was greater in individuals older than 2 years. Meanwhile, female fecundity was highly related to TL and weight. These findings did not always concur with previous observations from other asp populations, mainly in southern and northern Mesopotamia. Our results highlighted basic biological aspects of the local population and indicated differences between populations which can assist in fisheries management, conservation and commercial culture of the investigated species.

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Section: Discussionmentioning

confidence: 99%

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Al-Saleh¹,

Hammoud²,

Hussein³

et al. 2012

Turk. J. Fish. Aquat. Sci.

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“…Changes in the sperm characteristics of fish occur naturally during the breeding season. Parameters such as semen volume, spermatozoa concentration, percentage of motile cells, motility duration, morphology, pH and fertilizing capacity vary throughout the reproductive season, as described previously for ocean pout Macrozoarces americanus (Bloch & Scneider) (Wang & Crim 1997), red porgy Pagrus pagrus L. (Mylonas, Papadaki & Divanach 2003), Atlantic halibut Hippoglossus hippoglossus L. (Babiak, Ottesen, Rudolfsen & Johnsen 2006), Senegalese sole Solea senegalensis (Kaup) (Cabrita, Soares & Dinis 2006), spiny eel Mastacembelus mastacembelus (Bank & Solender) (Sahinöz, Aral & Dogu 2007) and Atlantic cod Gadus morhua L. (Rouxel, Suquet, Cosson, Severe, Quemener & Fauvel 2008). However, the changes observed in the sperm quality for different species do not follow the same pattern.…”

Section: Introductionmentioning

confidence: 87%

Sperm quality of Brazilian flounder Paralichthys orbignyanus throughout the reproductive season

Lanes

Okamoto

Bianchini

et al. 2010

Aquaculture Research

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The aim of this study was to evaluate the sperm quality of Brazilian £ounder Paralichthys orbignyanus throughout its reproductive season. Sperm was collected at the beginning, middle and end of the breeding period. Spermatozoa density was maximum at the beginning (12.7 AE 0.92 Â 10 9 cells mL À 1 ) and at the end (11.8 AE 0.39 Â 10 9 cells mL À 1 ) of the breeding season (Po0.05). Sperm production and the percentage of spermatozoa moving fast forward increased signi¢cantly towards the end of the breeding season (Po0.05). The mean duration of progressive motility of spermatozoa was around 10 min. No di¡erence was observed during the reproductive season in the percentage of motile cells, pH, osmolality and K 1 , Cl À and Mg 21 concentrations in seminal plasma. The concentration of Na 1 increased throughout the breeding season, reaching 174.62 AE 12.68 mmol L À 1 at the end (Po0.05). There was a decline in the concentration of Ca 21 (12.31 AE 3.08 mmol L À 1 ) in the middle of the breeding season, which coincided with the shortest motility duration of spermatozoa. The information reported in this study should help to improve management and optimize the development of protocols for short-term storage and cryopreservation of Brazilian £ounder semen.

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“…In addition, it is suggested that milt pH could be used as a simple tool for the evaluation of milt quality as in some examined fish, milt pH has shown a good correlation with sperm motility characteristics (i.e. percentage and duration of motility) (Lahnsteiner, Berger, Weismann & Patzner 1996; Lahnsteiner, Berger, Weismann & Patzner 1998; Ingermann, Bencic & Gloud 2002; ŞahinÖz, Aral & Doğu 2007).…”

Section: Introductionmentioning

confidence: 99%

“…Several studies have shown that hormonal treatments of adult fish improve milt quality in terms of sperm motility and sperm production (Lahnsteiner et al 1996; Clearwater & Crim 1998; Lahnsteiner et al 1998; Ingermann et al 2002; ŞahinÖz et al 2007). However, this effect has not been examined in Caspian brown trout.…”

Section: Introductionmentioning

confidence: 99%

Gonadotropin releasing hormone-analogue (GnRHa) treatment improves the milt production and sperm motility of endangered Caspian brown trout, Salmo trutta caspius, over the course of a spawning season

Hajirezaee

Amiri

Mehrpoosh

et al. 2011

Aquaculture Research

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To determine the e¡ect of gonadotropin releasing hormone-analogue (GnRHa) treatment on the milt quality of endangered Caspian brown trout, Salmo trutta caspius, the sperm motility (percentage and duration of motility), sperm production (sperm density, spermatocrit and milt volume) and milt pH were measured for GnRHa-treated (the treatment group) and untreated groups (the control group) during the spawning season. For untreated brooders, the values of the motility per cent, sperm density and spermatocrit decreased continuously during the spawning season while the milt volume, duration of motility and milt pH showed only a signi¢cant decrease at the end of the season. For GnRHa-treated males, these parameters increased 14 days after GnRHa treatment (¢rst milt collection) and then decreased continuously towards the end of the season. In addition, the values of milt and sperm density yielded per treated male were higher than that in the untreated group, although these were not statistically di¡erent. In any case, the total sum of yielded milt from the treatment group over the spawning season was higher than that in the untreated group. In this experiment, signi¢cant positive correlations were found between milt parameters as follows: sperm motility vs. milt pH; sperm density vs. spermatocrit; milt volume vs. spermatocrit; and milt volume vs. sperm density. The results show that the treatment of Caspian brown trout by GnRHa can improve the milt quality in terms of sperm motility and sperm production during a spawning season.

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Changes in Mesopotamian spiny eel, Mastacembelus mastacembelus (Bank & Solender in Russell, 1794) (Mastacembelidae) milt quality during a spawning period

Cited by 15 publications

References 47 publications

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Sperm quality of Brazilian flounder Paralichthys orbignyanus throughout the reproductive season

Gonadotropin releasing hormone-analogue (GnRHa) treatment improves the milt production and sperm motility of endangered Caspian brown trout, Salmo trutta caspius, over the course of a spawning season

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