Notes on the Biology of the Portunid Crab, Portunus sanguinolentus (Herbst), in Subtropical Queensland Waters

1989 ◽  
Vol 40 (6) ◽  
pp. 711 ◽  
Author(s):  
WD Sumpton ◽  
GS Smith ◽  
MA Potter
Keyword(s):  
Carapace Width ◽  
Mature Female ◽  
Mature Male ◽  
Oceanic Water ◽  
Mating Period ◽  
Male And Female ◽  
Estuarine Waters ◽  
Portunid Crab ◽  
Sexually Mature

Trawl-caught Portunus sanguinolentus were more abundant in oceanic than estuarine waters in south- east Queensland. In samples, males outnumbered females by 1.7 : 1. Males attained a larger size than females and, for a given carapace width, weighed more than females. The smallest sexually mature male and female crabs had carapace widths of 83 and 74 mm respectively. Crabs recruited to the sampled population throughout most of the year except during winter, when moulting activity was also limited. April-May was a major mating period, and it is postulated that mature female crabs moved into deeper oceanic water to spawn.

Influence of a novel male on the social behaviour of a captive group of mature female long-tailed macaques (Macaca fascicularis)

1982 ◽  
Vol 16 (2) ◽  
pp. 208-214 ◽  
Author(s):  
E. Jones ◽  
B. Byrne ◽  
M. R. A. Chance
Keyword(s):  
Sexual Activity ◽  
Social Behaviour ◽  
Macaca Fascicularis ◽  
Mature Female ◽  
Mature Male ◽  
Captive Group ◽  
The Social ◽  
Grooming Relationships ◽  
Small Colony ◽  
Sexually Mature

The replacement of a sexually mature, but sexually inactive, male by a novel mature male in a small colony of Macaca fascicularis brought about changes in social behaviour and structure. Particularly striking were the heightened levels of all sexual activity, especially in the females' invitation to the male to copulate. Cohesiveness around the male increased. Increased levels of agonism were noted and changes in the agonistic female hierarchy resulted. The grooming relationships in the colony were also significantly altered.

scholarly journals Spawning Induction System of Puntius javanicus using Common Carp as a Trigger

2007 ◽  
Vol 4 (2) ◽  
pp. 103
Author(s):  
M. Zairin Junior ◽  
R.K. Sari ◽  
M. Raswin
Keyword(s):  
Common Carp ◽  
Cyprinus Carpio ◽  
Fertilization Rate ◽  
Mature Female ◽  
Mature Male ◽  
Male And Female ◽  
Induced Spawning ◽  
Induction System

<p>This study was carried out to determine the effect of induction using common carp as a trigger on spawning of <em>Puntius javanicus</em>.  Mature male and female of <em>Puntius javanicus</em> were reared in outer of the hapa that contains mature male common carp, mature female common carp, or mature male and female common carp as a control.  Common carp broodstock was injected or not injected by ovaprim.  The result of study show that the use of male common carp injected or not injected by ovaprim could induced spawning of <em>Puntius javanicus</em>, without the release of sperm and eggs of common carp.   Fertilization rate of <em>Puntius javanicus</em> eggs was high, reached of 91.4%, by using ovaprim-injected male common carp as trigger.</p> <p>Keywords: <em>Puntius javanicus</em>, common carp, <em>Cyprinus carpio</em>, spawning, induction system</p> <p><em> </em></p> <p>ABSTRAK</p> <p>Penelitian ini dilakukan untuk mengetahui pengaruh sistem imbas menggunakan ikan mas (<em>Cyprinus carpio</em>) sebagai pemicu terhadap pemijahan ikan tawes (<em>Puntius javanicus</em>). Induk ikan tawes jantan dan betina yang telah matang gonad ditempatkan di luar hapa tempat ikan mas jantan matang gonad, ikan mas betina matang gonad, atau sepasang ikan mas matang gonad sebagai perlakuan kontrol. Induk ikan mas disuntik atau tidak dengan ovaprim.  Hasil penelitian menunjukkan bahwa penggunaan ikan mas yang disuntik ovaprim maupun tidak, dapat mengimbas ikan tawes untuk memijah meskipun tidak terjadi pengeluaran sperma dan telur ikan mas. Derajat pembuahan telur ikan tawes cukup tinggi, mencapai 91,4%, pada perlakuan induksi ikan mas jantan yang disuntik ovaprim.</p> <p>Kata kunci: <em>Puntius javanicus</em>, common carp, <em>Cyprinus carpio</em>, pemijahan, sistem imbas</p>

scholarly journals Histological Changes in the Regressing Reproductive Organs of Sexually Mature Male and Female Japanese Quail

1974 ◽  
Vol 11 (2) ◽  
pp. 168-179 ◽  
Author(s):  
Victor P. Eroschenko ◽  
Wilbor O. Wilson
Keyword(s):  
Japanese Quail ◽  
Reproductive Organs ◽  
Mature Male ◽  
Histological Changes ◽  
Male And Female ◽  
Sexually Mature

Chemical Communication and Behavioural Interaction Between Sexually Mature Male and Female Shore Crabs (Carcinus Maenas)

1996 ◽  
Vol 76 (3) ◽  
pp. 691-699 ◽  
Author(s):  
S.D. Bamber ◽  
E. Naylor
Keyword(s):  
Chemical Communication ◽  
Carcinus Maenas ◽  
Mature Male ◽  
Specific Nature ◽  
Male And Female ◽  
Behavioural Bioassay ◽  
Shore Crabs ◽  
Sexually Mature ◽  
Similar Intensity ◽  
Reduced Intensity

A new behavioural bioassay system has been used to examine chemical communication in the crab Carcinus maenas (Crustacea: Brachyura) and has demonstrated the sexually and temporally specific nature of a putative sex pheromone. Mature premoult and postmoult females evoked sexual behavioural responses from receptive male crabs. No response was obtained when intermoult female and premoult and postmoult male crabs were tested. Postmoult females continued to be chemically attractive to male crabs with a similar intensity to that of late premoult females for >8 d following moulting, and then with a reduced intensity for >14 d. Male C. maenas successfully entered copula with females >13 d after the female moult.

Testosterone Production and Metabolic Clearance Rates in Sexually Mature Male and Female Skate (Raja radiata)

Endocrinology ◽  
1969 ◽  
Vol 85 (3) ◽  
pp. 552-560 ◽  
Author(s):  
G. L. FLETCHER ◽  
D. C. HARDY ◽  
D. R. IDLER
Keyword(s):  
Mature Male ◽  
Metabolic Clearance ◽  
Clearance Rates ◽  
Male And Female ◽  
Testosterone Production ◽  
Raja Radiata ◽  
Sexually Mature

Radio-tracking of Peromyscus leucopus

1977 ◽  
Vol 55 (2) ◽  
pp. 465-468 ◽  
Author(s):  
Pierre Mineau ◽  
Dale Madison
Keyword(s):  
Peromyscus Leucopus ◽  
Mature Male ◽  
Home Ranges ◽  
Radio Tracking ◽  
Male And Female ◽  
Radio Transmitters ◽  
Range Overlap ◽  
And Behavior ◽  
Free Ranging ◽  
Sexually Mature

Miniature radio transmitters and 'local' triangulation methods were used to monitor the movements of free-ranging Peromyscus leucopus. A sexually mature male and female were studied in detail during two sessions within a 6-week period. Positions were recorded on 107 occasions, giving home ranges of 1.26 ha for the male and 0.91 ha for the female. Extensive home range overlap, correspondence in patterns of movement, the bearing of a litter by the female, and the lack of other adults in the study area indicate pair activity. The equipment and methods described will enable more thorough studies of the ecology and behavior of small, highly mobile rodent species in the future.

The first report of albinism in a Sundaland endemic rodent

Mammalia ◽  
2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Jonathan A. Nations ◽  
Ahmad Mursyid ◽  
Ryski Darma Busta ◽  
Sah Putra Adrian ◽  
Heru Handika ◽  
...  
Keyword(s):  
Southeast Asia ◽  
Mature Male ◽  
Congenital Disorder ◽  
Domesticated Animals ◽  
First Report ◽  
West Sumatra ◽  
Sexually Mature

AbstractAlbinism, a congenital disorder that results in a lack of melanin deposition, is common in domesticated animals but rare in nature. Among the ∼2500 species of rodents worldwide, only 67 have published reports of albinism. Here we report the capture of an albino murid (Muridae: Rodentia) from Mt. Singgalang in West Sumatra, Indonesia. The specimen is an adolescent but sexually mature male Maxomys hylomyoides, a montane Sumatran endemic. To our knowledge, this specimen represents the first reported albino rodent from Indonesia and Sundaland, and only the second from Southeast Asia.

The Parasitic Rhizocephalan Barnacle Sacculina Carcini in Crabs of the Forth Estuary, Scotland

1998 ◽  
Vol 78 (2) ◽  
pp. 665-667 ◽  
Author(s):  
S. Mathieson ◽  
A.J. Berry ◽  
S. Kennedy
Keyword(s):  
Carapace Width ◽  
High Tide ◽  
Carcinus Maenas ◽  
Size Class ◽  
Infection Rates ◽  
Lower Estuary ◽  
Male And Female ◽  
Sacculina Carcini ◽  
Middle Estuary

In the Forth Estuary, Scotland, parasitic rhizocephalan barnacle Sacculina carcini externae or scars occurred on 64% of Carcinus maenas from the subtidal channel of the middle estuary. These became more frequent downstream, infecting 46·9% in the lower estuary basin. Male and female crabs were infected equally, and infection rates in low-tide samples did not differ from high-tide. The parasites occurred most frequently on crabs of 40–50 mm carapace width (CW) rather than the modal crab size class of 50–60 mm. Downstream, proportionately more smaller than larger crabs bore parasites whereas, further upstream, more larger than smaller crabs bore parasites. There is evidence for the annual appearance of new externae in July-October, especially in the lower estuary basin, followed by their growth and loss after about a year.

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