Reproductive biology of the endemic skate Psammobatis lentiginosa in the San Matías Gulf (south-western Atlantic)

2010 ◽  
Vol 91 (6) ◽  
pp. 1165-1173 ◽  
Author(s):  
Raquel Perier ◽  
Marilú Estalles ◽  
Marina Coller ◽  
Edgardo E. Di Giacomo
Keyword(s):  
Reproductive Biology ◽  
First Record ◽  
Distribution Area ◽  
Western Atlantic ◽  
North Patagonia ◽  
Total Length ◽  
South West ◽  
The Mean ◽  
Continuous Presence ◽  
Reproductive Aggregation

The reproductive biology of Psammobatis lentiginosa was studied in San Matías Gulf (Patagonia, south-west Atlantic). A total of 1033 skates was analysed, total length ranged from 17 to 52 cm for females and from 13 to 55 cm for males. Total length–total weights relationships differed between sexes, with TW = 0.005 × TL3.02 for females and TW = 0.005 × TL2.97 for males. The overall sex-ratio was 1:1. In females, the L50% was 41.06 cm, in males the L50% was 41.38 cm. The mean number of yolked oocytes per skate was 4.22 (±2.41). The mean number of yolked oocytes and the length of the female were linearly related. The diameter maximum of yolked oocytes was 24 mm. The species exhibited a continuous reproductive cycle throughout the year, with a peak of egg-case production during autumn that was synchronous with maximum values of the epididymis and uterus indices. This is the first record of a reproductive aggregation for P. lentiginosa in San Matías Gulf, North Patagonia. This finding together with its continuous presence around the year, suggest that this area is the main distribution area of P. lentiginosa in the south-west Atlantic.

scholarly journals Reproductive Biology of Coral Catshark Atelomycterus marmoratus (Anonymous [Bennett], 1830) in Seribu Islands, Indonesia

2019 ◽  
Vol 20 (8) ◽  
Author(s):  
Selvia Oktaviyani ◽  
WANWAN KURNIAWAN ◽  
FAHMI
Keyword(s):  
Reproductive Biology ◽  
Gonadosomatic Index ◽  
Maturity Stage ◽  
Total Length ◽  
Mean Size ◽  
The Mean ◽  
First Maturity ◽  
The Relationship ◽  
Monthly Variations ◽  
Size At First Maturity

This study provides information on the reproductive biology of the coral catshark caught in the waters around Seribu Islands, Indonesia. A total of 257 coral catsharks were collected from February 2017 to January 2018. The total length of coral catshark ranged from 170 to 585 mm for females and 255-575 mm for males, respectively. The total weight of females ranged from 85 to 640 g and males from 100 to 620 g The sex ratio between females and males was 0.45 and it was not significantly different from the expected 1:1 ratio. The growth pattern of coral catsharks in Seribu Island was negatively allometric and the population was dominated by mature sharks. The mean size at first maturity was estimated to be 557 mm for females and 514 mm for males, based on to the relationship between the proportion between maturity stage and total length. The ovulation season was estimated occur from October to March, whereas September to April was mating season based on monthly variations of gonadosomatic index (GSI) values and the occurrence of egg cases in uterus.

First record of the snapper-choking isopod Cymothoa excisa (Isopoda: Cymothoidae) parasitizing invasive lionfish Pterois volitans (Scorpaeniformes: Scorpaenidae)

2017 ◽  
Vol 98 (8) ◽  
pp. 2095-2097 ◽  
Author(s):  
Alfonso Aguilar-Perera ◽  
Luis Quijano-Puerto ◽  
Evelyn Carrillo-Flota ◽  
Ernest H. Williams ◽  
Lucy Bunkley-Williams
Keyword(s):  
Coral Reefs ◽  
Gulf Of Mexico ◽  
Body Length ◽  
Buccal Cavity ◽  
First Record ◽  
Pterois Volitans ◽  
Western Atlantic ◽  
Total Length ◽  
Southern Gulf Of Mexico ◽  
Invasive Lionfish

Two female snapper-choking isopods Cymothoa excisa (body length 11 and 14 mm) were in the buccal cavity of two invasive lionfish Pterois volitans (total length 294 and 301 mm) collected in Alacranes Reef, southern Gulf of Mexico. This is the first record of C. excisa parasitizing invasive lionfish P. volitans in coral reefs of the Western Atlantic, where these isopods appear to have infected the host through adult prey-predator transfer.

scholarly journals reproductive biology and seasonal distribution of mustelus schmitti (elasmobranchii: triakidae) in the rio de la plata oceanic front, south-western atlantic

2005 ◽  
Vol 85 (5) ◽  
pp. 1193-1198 ◽  
Author(s):  
maría cristina oddone ◽  
laura paesch ◽  
walter norbis
Keyword(s):  
Reproductive Biology ◽  
Litter Size ◽  
Rio De La Plata ◽  
Adult Males ◽  
Río De La Plata ◽  
Western Atlantic ◽  
La Plata ◽  
Oceanic Front ◽  
The Mean ◽  
Mustelus Schmitti

the population structure and reproductive biology of mustelus schmitti was analysed during autumn (1994, 1995) and spring (1994) in the rio de la plata oceanic front. the samples consisted mainly of adult males and immature females, indicating that nursery areas are situated elsewhere. in autumn, the highest female densities occurred between 36°s and 35°s, with densities decreasing further south, and high male densities occurred over all latitudes of the study area. in spring, both sexes occurred north of latitude 36°30′s. males attained maturity at 59 cm total length (tl), and females at 72 cm tl. litter size varied from one to ten in spring and two to nine in autumn, with embryos ranging from 9 to 26 cm and 7 to 26 cm tl respectively. the mean tl of embryos was significantly higher in spring (22 cm), suggesting that parturition occurs in late spring and summer. litter size was found to increase with female tl.

scholarly journals Reproductive Biology of the Mola Carplet Amblypharyngodon mola (Hamilton) (Cypriniformes: Cyprinidae) from Netrakona Water

1970 ◽  
Vol 44 (3) ◽  
pp. 377-379 ◽  
Author(s):  
Bimal Kanta Saha ◽  
M Rafiqul Islam ◽  
Aparna Saha ◽  
M Altaf Hossain
Keyword(s):  
Sex Ratio ◽  
Key Words ◽  
Reproductive Biology ◽  
Standard Length ◽  
Mean Value ◽  
Total Weight ◽  
Total Length ◽  
The Mean

Some aspects of the reproductive biology viz. sex ratio, fecundity and reproductive periodicity of Amblypharyngodon mola were studied during March 2004 through February 2005 in Netrakona. Sex ratio was found to be 1:2.03. Fecundity varied from 1,291 to 12,797 with a mean value 5,751.46 ± 3,321.73 eggs. The relationships between Fecundity (F) and Total Length (TL), Standard Length (SL), Total Weight (TW), Gonadal length (GL) and Gonadal Weight (GW) were calculated and found to be highly significant. The mean of ova diameter was 1.4 ± 0.35mm. Different methods used to study the reproductive periodicity showed that the periodicity of A. mola starts from March and continues up to August with a peak in May. Key words: Reproductive biology, Reproductive periodicity, Amblypharyngodon mola. DOI: 10.3329/bjsir.v44i3.4414 Bangladesh J. Sci. Ind. Res. 44(3), 377-379, 2009   

scholarly journals First record of Aplatophis chauliodus (Actinopterygii: Ophichthidae) for the northeatern coast of Brazil, with expansion of its geographic range

2017 ◽  
Vol 18 (2) ◽  
Author(s):  
Cláudio Luis Santos Sampaio ◽  
Paulo Roberto Duarte Lopes ◽  
Jailza Tavares de Oliveira-Silva
Keyword(s):  
Atlantic Ocean ◽  
First Record ◽  
Geographic Range ◽  
Western Atlantic ◽  
Western Atlantic Ocean ◽  
Total Length ◽  
A Site ◽  
First Time ◽  
Northeastern Coast

The presence of Aplatophis chauliodus in the northeastern coast of Brazil (Western Atlantic Ocean) is recorded for first time on the basis of one specimen measuring 670,0 mm in total length collected in Todos os Santos Bay (Bahia state), a site with estuarine characteristics.

scholarly journals The marine leech Stibarobdella loricata (Harding, 1924) (Hirudinea, Piscicolidae), parasitic on the angel shark Squatina spp. and sandtiger shark Carcharias taurus Rafinesque, 1810 (Chondrichthyes: Squatinidae, Carchariidae) in Southern Brazilian waters

2003 ◽  
Vol 63 (4) ◽  
pp. 691-694 ◽  
Author(s):  
J. M. R. Soto
Keyword(s):  
First Record ◽  
Southern Coast ◽  
Dorsal Region ◽  
Western Atlantic ◽  
Total Length ◽  
Parasitic Association ◽  
Carcharias Taurus

The presence of the marine leech, Stibarobdella loricata (Harding, 1924) (Hirudinea, Piscicolidae), is reported on the southern coast of Brazil, based on seven lots with 47 specimens, between 71 and 182 mm in total length, collected on the dorsal region of angel sharks, Squatina argentina (Marini, 1930); S. guggenheim Marini, 1936; S. punctata Marini, 1936 (Chondrichthyes, Squatinidae); and on the head of a sandtiger shark, Carcharias taurus Rafinesque, 1810 (Chondrichthyes, Carchariidae). This is the first record of S. loricata in the western Atlantic and of its parasitic association with S. argentina, S. guggenheim, S. punctata, and C. taurus.

scholarly journals Avian electrocution mortality in relation to pole design and adjacent habitat in Spain

2001 ◽  
Vol 11 (1) ◽  
pp. 3-12 ◽  
Author(s):  
GUYONNE F. E. JANSS ◽  
MIGUEL FERRER
Keyword(s):  
Adult Population ◽  
Total Mortality ◽  
Distribution Area ◽  
Annual Number ◽  
Habitat Types ◽  
Natural Habitats ◽  
South West ◽  
Spanish Imperial Eagle ◽  
Imperial Eagle ◽  
The Mean

Quantitative differences were assessed in avian mortality by electrocution between the most frequent pole designs and habitat types in south-west Spain. Pin-type insulators in natural habitats accounted for 36.9% of total avian mortality. Including all species, we estimated a mean annual death rate of 4.5 birds per 100 poles (95% confidence interval: 3.0- 6.03), of which 53.8% were diurnal birds of prey. We identified all power poles in the distribution area of the Spanish Imperial Eagle Aquila adalberti population of the Doñana area. The estimated total mortality for adults was 0.38 birds per year and for immature eagles 3.38, which was 1.3% of the adult population and 30.0% of the mean annual number of fledged young. Adequate modification of 18.6% of power poles in the distribution area of the eagle population could reduce the total estimated mortality by 51.6%.

First record of Sphoeroides spengleri (Osteichthyes: Tetraodontidae) in the Mediterranean Sea

2004 ◽  
Vol 84 (5) ◽  
pp. 1089-1090 ◽  
Author(s):  
J.A. Reina-Hervás ◽  
J.E. García Raso ◽  
M.E. Manjón-Cabeza
Keyword(s):  
Alien Species ◽  
Mediterranean Sea ◽  
First Record ◽  
Western Mediterranean ◽  
Alboran Sea ◽  
Total Length ◽  
The Mediterranean ◽  
Alborán Sea

The capture of a specimen of Sphoeroides spengleri (Osteichthyes: Tetraodontidae), 17 December 2000 and 29·7 mm total length, from the Málaga coast (Alborán Sea, western Mediterranean) represents the first record of a new alien species for Mediterranean waters.

Archaeological Discoveries in Sicily and Magna Graecia

1939 ◽  
Vol 59 (2) ◽  
pp. 213-228
Author(s):  
Umberto Zanotti-Bianco
Keyword(s):  
Eighteenth Century ◽  
Ground Level ◽  
The South ◽  
Total Length ◽  
Magna Graecia ◽  
South West ◽  
Southern Side ◽  
The Temple ◽  
Southern Flank

In my previous report (JHS, 1938, p. 247) I spoke of the work being carried on at Syracuse to bring to light the remains of the temple of Apollo. The east, north, and west sides had been freed by then, whilst the southern side was still hidden under seventeenth- and eighteenth-century houses, so that it had never been possible to dig trial trenches through their foundations to ascertain if any part of the temple was preserved there. The demolition of the houses and the excavation under the modern ground level beginning from the south-west angle have fully satisfied our hopes. Five columns of the southern flank of the peristasis have appeared, preserved to a height of over 2 metres, with the stylobate beneath them (Fig. 1): only the angle column had been destroyed during the building of the walls of the Spanish barracks. The cella is equally well preserved, and a third of its total length has already been liberated, although the work is in temporary suspense owing to unsettled disputes with the owners of the houses. The southern flank of the archaic Syracusan temple appears to be in much better condition than the others.

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