First record on size at sexual maturity and optimum catchable length of 10 marine fishes from the Bay of Bengal (Bangladesh) through multi-models approach: a key for sound fisheries management

2021 ◽  
Author(s):  
Zannatul Mawa ◽  
Md. Yeamin Hossain ◽  
Md. Rabiul Hasan ◽  
Sumaya Tanjin ◽  
Md. Ashekur Rahman ◽  
...  
Keyword(s):  
Fisheries Management ◽  
Bay Of Bengal ◽  
Sexual Maturity ◽  
First Record ◽  
Marine Fishes ◽  
Size At Sexual Maturity

First record of two marine fish species from the northern Bay of Bengal, Bangladesh

2021 ◽  
Vol 33 (1) ◽  
pp. 129-136
Author(s):  
TANIA SIDDIQUEKI ◽  
MD. JAYEDUL ISLAM ◽  
A. H. M. SHAFIULLAH HABIB ◽  
SHANUR JAHEDUL HASAN ◽  
MD. LATIFUL ISLAM ◽  
...  
Keyword(s):  
Dna Barcoding ◽  
Bay Of Bengal ◽  
New Record ◽  
First Record ◽  
Marine Fishes ◽  
Marine Fish Species ◽  
Marine Waters ◽  
Morphometric Characters ◽  
Naso Unicornis ◽  
Northern Bay Of Bengal

The present study reports a new record of two marine fishes Filimanus similis (Feltes 1991) and Naso unicornis (Forsskål 1775) from Bangladesh waters. The specimens were collected from Saint Martin’s Island and Cox’s Bazar fish landing canter, Bangladesh. The specimens were diagnosed by analyzing their morphometric characters and DNA barcoding. The study also reports Naso as the first species of the genus ever recorded in the marine waters of Bangladesh.

A new aspidogastrid trematode Lobatostoma hanumanthai n.sp. from a marine fish in the Bay of Bengal

1980 ◽  
Vol 54 (4) ◽  
pp. 233-239 ◽  
Author(s):  
S. V. Narasimhulu ◽  
R. Madhavi
Keyword(s):  
Marine Fish ◽  
Bay Of Bengal ◽  
First Record ◽  
Marine Fishes ◽  
Indian Region ◽  
Anatomical Characters

AbstractLobatostoma hanumanthai n.sp. is described from the intestine of the carangid Trachinotus blochi from Bay of Bengal. It anatomical characters are compared with previously described species in the genus. This is the first record of an aspidogastrean from marine fishes of the Indian region.

scholarly journals SIZE AT SEXUAL MATURITY IN THE QUEEN CONCH STROMBUS GIGAS FROM COLOMBIA

2006 ◽  
Vol 35 ◽  
Author(s):  
Omar Hernando Avila-Poveda ◽  
Erick Raúl Baqueiro-Cárdenas
Keyword(s):  
Fisheries Management ◽  
Shell Length ◽  
Sexual Maturity ◽  
Developmental Stages ◽  
Management Tool ◽  
Strombus Gigas ◽  
Queen Conch ◽  
Mature Gonad ◽  
Size At Sexual Maturity ◽  
San Andres

Size at sexual maturity was investigated in 346 queen conch, Strombus gigas, collected from the Archipelago of San Andres, Providencia and Santa Catalina (SAI), Colombia. Size at sexual maturity is defined as the size (based on total shell length and lip thickness) at which 50 % of the population of queen conch sampled had mature and emission gonad developmental stages, based on microscopic examination (samples of gonads were processed by standardized histological methods). Only 12.14% of whole samples had mature and emission gonad developmental stages. The size at sexual maturity based on total shell length (STmat) was estimated to be STmat=249 mm for females (n=14), STmat=234 mm for males (n=28) and STmat=241 mm for both sexes (n=42). Lip thickness (LTmat) at sexual maturity was estimated to be LTmat=17.5 mm for females, LTmat=13 mm for males and LTmat=13.5 mm for both sexes. STmat and LTmat for females were greater than those estimated for males, according to plot of the cumulative size frequencies. The maximum sizes that had mature gonad stage were 285 mm ST and 24 mm LT for males (n=2) and 280 mm ST and 30 mm LT for females (n=2). The present size restrictions adopted by some countries with queen conch fisheries is 5 mm LT and/or 180-250 mm ST, which is not adequate to protect conch stocks. A lip thickness of 13.5 mm or greater appears from this study as to be a better maturity criterion. Therefore, this criterion should be adopted by Caribbean countries as a fisheries management tool in order to protect the queen conch fishery and ensure sustainability of the fishery.

scholarly journals Use of otoliths to estimate size at sexual maturity in fish

2000 ◽  
Vol 43 (4) ◽  
pp. 437-440 ◽  
Author(s):  
Carlos Sérgio Agostinho
Keyword(s):  
Sexual Maturity ◽  
Line Segments ◽  
Alternative Method ◽  
Straight Line ◽  
Size At Sexual Maturity

The viability of an alternative method for estimating the size at sexual maturity of females of Plagioscion squamosissimus (Perciformes, Sciaenidae) was analyzed. This methodology was used to evaluate the size at sexual maturity in crabs, but has not yet been used for this purpose in fishes. Separation of young and adult fishes by this method is accomplished by iterative adjustment of straight-line segments to the data for length of the otolith and length of the fish. The agreement with the estimate previously obtained by another technique and the possibility of calculating the variance indicates that in some cases, the method analyzed can be used successfully to estimate size at sexual maturity in fish. However, additional studies are necessary to detect possible biases in the method.

scholarly journals A comparison of the allometric growth in Uca leptodactyla (Crustacea: Brachyura: Ocypodidae) from two subtropical estuaries

2004 ◽  
Vol 84 (4) ◽  
pp. 733-735 ◽  
Author(s):  
Rosana Carina Flores Cardoso ◽  
Maria Lucia Negreiros-Fransozo
Keyword(s):  
Growth Pattern ◽  
Sexual Maturity ◽  
Carapace Length ◽  
Brazilian Coast ◽  
Allometric Growth ◽  
Size At Sexual Maturity ◽  
Subtropical Estuaries ◽  
Habitat Similarity

The allometric growth of Uca leptodactyla from two distinct subtropical estuaries on the Brazilian coast was evaluated concerning its growth pattern and size at onset of sexual maturity. Females attained maturity at similar sizes in both sites (4·1 mm of carapace length in Indaiá and 4·2 mm in Ubatumirim), while males differed slightly. They reached the size at sexual maturity of 5·3 mm of carapace length in Indaiá and 4·6 mm in Ubatumirim. Growth pattern is usually similar among crabs from distinct sites while size at sexual maturity is frequently different. However, in the case of U. leptodactyla it did not occur, probably due to the strong habitat similarity and intrinsic features of this species.

scholarly journals First record of roving coral grouper Plectropomus pessuliferus (Fowler, 1904) from Saint Martin’s Island, Bangladesh based on Morphology and DNA Barcoding

2021 ◽  
Vol 32 (2) ◽  
pp. 293-301
Author(s):  
MD JAYEDUL ISLAM ◽  
SHARMIN AKTER ◽  
PROVAKOR SARKAR ◽  
MOHAMMAD RASHED ◽  
IREEN PARVIN ◽  
...  
Keyword(s):  
Dna Barcoding ◽  
Bay Of Bengal ◽  
New Record ◽  
First Record ◽  
Morphological Characters ◽  
Marine Waters ◽  
First Report ◽  
Saint Martin ◽  
Northern Bay Of Bengal

A new record of Plectropomus pessuliferus (Serranidae: Epinephelinae) wasdocumented based on morphological characters and DNA barcoding. The species was collectedduring a regular survey for making an inventory of reef associated fishes in Saint Martin`sIsland, Bangladesh. This is the first report of roving coral grouper from the marine waters ofBangladesh validated by morpho-meristic analysis and DNA barcoding. This is also the firstreport from the northern Bay of Bengal.

scholarly journals Seasonal variations in the population biology of Salmostoma bacaila (Cyprinidae) from a tributary of the Payra River, Bangladesh

2019 ◽  
pp. 113-119
Author(s):  
Ahamed Ahamed ◽  
Faruque Ahmed Zoarder ◽  
Jun Ohtomi
Keyword(s):  
Sex Ratio ◽  
Seasonal Variations ◽  
Population Biology ◽  
Sexual Maturity ◽  
Condition Factor ◽  
Gonadosomatic Index ◽  
Spawning Season ◽  
Frequency Distributions ◽  
Size At Sexual Maturity ◽  
Management And Conservation

Some biological parameters of Salmostoma bacaila – including sex ratio, length-frequency distributions (LFDs), size at sexual maturity, spawning season, length-weight relationships (LWRs) and condition factor – were studied. Samples were collected seasonally during June 2017 to May 2018 from a tributary of the Payra River. The overall sex ratio was significantly different from the expected value of 1:1 (p < 0.001), in favour of male specimens. Females were significantly larger than males. Size at sexual maturity was estimated at 7.6~7.7 cm total length. Seasonal variations in the gonadosomatic index (GSI) indicate that the main spawning season is from spring to summer. The LWRs showed negative allometric growth in both sexes, but with clear seasonal variation. Fulton’s condition factor varied in both sexes and was attributed to variations in GSI with maturity. The fin¬dings of this study will be helpful for management and conservation of S. bacaila populations.

Chamelea gallina reproductive biology and Minimum Conservation Reference Size: implications for fishery management in the Adriatic Sea

BMC Zoology ◽  
2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Giada Bargione ◽  
Fortunata Donato ◽  
Giulio Barone ◽  
Massimo Virgili ◽  
Pierluigi Penna ◽  
...  
Keyword(s):  
Sexual Maturity ◽  
Adriatic Sea ◽  
Seawater Temperature ◽  
Reproductive Capacity ◽  
Great Effort ◽  
Important Species ◽  
Spawning Period ◽  
The Past ◽  
Chamelea Gallina ◽  
Size At Sexual Maturity

Abstract Background The striped venus clam Chamelea gallina is an economically important species in Adriatic Sea fisheries. The use of hydraulic dredging for its catch has a long history in Italy and its management faced several stages of development in the last 40 years. A great effort has been made in the past two decades to move from poorly or weakly managed fisheries to a well-structured co-management system to improve the sustainability of this fishery. However, a prerequisite for appropriate resource management is a sound knowledge of the biology and reproductive strategy of the species. Results We investigated three major biological features– the gametogenic cycle, size at sexual maturity and partial fecundity – by microscopic, histological and video analysis techniques. We demonstrated that its breeding season is driven by rises in seawater temperature and chlorophyll-a concentration and that its spawning period lasted from March to September. Size at sexual maturity was reached very early in the life cycle. As regards partial fecundity – the number of mature oocytes potentially released by females with ripe gonads in a single release event – varied in relation to size. Nevertheless, the reduction on the Minimum Conservation Reference Size (MCRS) from 25 to 22 mm (Delegated Regulation (EU) 2020/2237) lead to a 40% reduction in the number of emitted eggs. Conclusions We suggest that the ability of Adriatic clam stocks to withstand the strong fishing pressure of the past 40 years and the present one is due to their high reproductive potential and multiple spawning events combined with the effect of management measures (closed areas/seasons, quota, MCRS) and technical constraints on the gear and the sieve on board. Moreover, since the reduced MCRS for Venus shells is still larger than the size at maturity, it will probably not be detrimental to the reproductive capacity of the stock.

scholarly journals New records of cucullanid nematodes from marine fishes off New Caledonia, with descriptions of five new species of Cucullanus (Nematoda, Cucullanidae)

Parasite ◽  
2020 ◽  
Vol 27 ◽  
pp. 37 ◽  
Author(s):  
František Moravec ◽  
Jean-Lou Justine
Keyword(s):  
New Species ◽  
New Caledonia ◽  
First Record ◽  
Marine Fishes ◽  
New Host ◽  
Type Host ◽  
Unknown Species ◽  
The Pacific ◽  
Electron Microscopical ◽  
The Taiwan Strait

Recent examinations of cucullanid nematodes (Cucullanidae) from marine fishes off New Caledonia, collected in the years 2004–2009, revealed the presence of the following five new species of Cucullanus Müller, 1777, all parasitic in Perciformes: Cucullanus variolae n. sp. from Variola louti (type host) and V. albimarginata (both Serranidae); Cucullanus acutospiculatus n. sp. from Caesio cuning (Caesionidae); Cucullanus diagrammae n. sp. from Diagramma pictum (Haemulidae); Cucullanus parapercidis n. sp. from Parapercis xanthozona (type host) and P. hexophtalma (both Pinguipedidae); and Cucullanus petterae n. sp. from Epinephelus merra (type host) and E. fasciatus (both Serranidae). An additional congeneric species, Cucullanus bioccai Orecchia et Paggi, 1987 was recorded from Mugil cephalus (Mugilidae, Mugiliformes) (first record in the Pacific Ocean) and Cucullanus sp. (only female) was found in Arothron manilensis (Tetraodontidae, Tetraodontiformes). Furthermore, two known cucullanid species, Dichelyne (Cucullanellus) branchiostegi (Yamaguti, 1941) in Branchiostegus wardi (Malacanthidae, Perciformes) (new host and geographical records) and Dichelyne (Cucullanellus) bodiani Moravec et Justine, 2019 in Bodianus busellatus (new host) and B. perditio (both Labridae, Perciformes), were found; Dichelyne (Cucullanellus) sp. (only females) coinfecting the latter host may represent an unknown species. Most species are described based on light and electron microscopical studies. The specimens described by Xu et al., 2017 as Cucullanus bourdini Petter et Le Bel, 1992 from Caesio xanthonota (Caesionidae) in the Taiwan Strait are considered to represent a new species, for which the name Cucullanus sinensis n. sp. is proposed.

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