scholarly journals Mating behavior of Patagonian octopus (Octopus tehuelchus) under laboratory conditions

2020 ◽  
Vol 33 (1) ◽  
pp. 115-120 ◽  
Author(s):  
Mercedes Berrueta ◽  
Julián A. Desiderio ◽  
Florencia Agliano ◽  
Andrea Victoria López ◽  
Eddie O. Aristizabal Abud ◽  
...  
Keyword(s):  
Sexual Intercourse ◽  
Mating Behavior ◽  
Reproductive Behavior ◽  
Artisanal Fishery ◽  
Male And Female ◽  
Northern Area ◽  
Laboratory Conditions ◽  
In Captivity ◽  
Patagonian Coast ◽  
Aquaculture Development

Patagonian octopus (Octopus tehuelchus) is a species that holds an artisanal fishery in the northern area of the Argentine Patagonian coast and has a potential for aquaculture development. This work aimed to characterize the mating behavior of four pairs of Patagonian octopuses under laboratory conditions. Results showed that this species has a complex reproductive behavior. Remarkably, female remained inside her shelter during pre-copula, copulation and intercourse events. Male and female faced by the oral face during sexual intercourse, which lasted 3 to 5 min. The observations will contribute to the better management of the reproductive specimens of the species in captivity.

scholarly journals Natural history of Ctenus medius Keyserling, 1891 (Aranae, Ctenidae) II: life cycle and aspects of reproductive behavior under laboratory conditions

2002 ◽  
Vol 62 (4b) ◽  
pp. 787-793 ◽  
Author(s):  
E. FOLLY-RAMOS ◽  
C. E. ALMEIDA ◽  
M. CARMO-SILVA ◽  
J. COSTA
Keyword(s):  
Life Cycle ◽  
Natural History ◽  
Reproductive Behavior ◽  
Sexual Maturity ◽  
Immature Stage ◽  
Laboratory Conditions ◽  
Biological Studies ◽  
In Captivity ◽  
The Moment ◽  
A Site

Ctenus medius Keyserling, 1891 is a wandering spider common in the Brazilian Atlantic Forest. It has been the subject of few studies. Thus, this work aims to elucidate aspects of its natural history, such as the life cycle and reproductive behavior of this species, through laboratory and field observations. Two females with egg sacs were observed in the laboratory and one was observed in field (Barra Mansa, 22º32'S and 44º10'W) until the emergence of the spiderlings. For observation of the immature stage development, a portion of the spiderlings from the same hatch were taken to the laboratory and watched until sexual maturity. In the field, the period between the oviposition and the emergence of spiderlings was of 36 days. The female selects a site for egg sac deposition and stays there until the spiderlings emerge. Seven days after the emergence, the female abandoned the site where the egg sac was made, concomitant to the spiderlings dispersion from observation's place and until the moment that the spiderlings started to eat. For the spiderlings kept under laboratory conditions, cannibalism was not observed in the first instars (1-4th) when sufficient food was offered. Sexual maturity happened in the 14th or 15th instars, with an average of 309.2 to 344.5 days until the last/sexual molt, respectively. Until the date of sexual maturity, there was a mortality rate of 85%. This species is very fragile in captivity. This hampered deductions concerning longevity. Both females and males collected in the field were induced to mate in the laboratory. Courtship movements of males were registered, but the females did not permit the mating. These data may assist in initial biological studies of Ctenus genus and offer comparative parameters for studies of other related species.

Reproductive behavior of the blind mole-rat (Spalax ehrenbergi) in a seminatural burrow system

2000 ◽  
Vol 78 (4) ◽  
pp. 570-577 ◽  
Author(s):  
Irit Gazit ◽  
Joseph Terkel
Keyword(s):  
Reproductive Behavior ◽  
Spalax Ehrenbergi ◽  
Mole Rat ◽  
Management Protocol ◽  
In Captivity ◽  
Set Up ◽  
Tunnel System ◽  
Insight Into ◽  
Significant Factors ◽  
Lengthy Process

The blind mole-rat (Spalax ehrenbergi) is a fossorial mammal that is solitary and highly aggressive in nature. The consequent difficulties of maintaining this species in captivity have hindered attempts to gain insight into its behavior and reproductive biology. This article describes an innovative artificial tunnel system and management protocol that facilitated our study of the reproductive behavior of the blind mole-rat in captivity. The study employed a naturalistic approach that allowed the animals to establish separate territories in a seminatural tunnel system and to become familiar with each other over a period of months. This approach contrasts with previous unsuccessful attempts in which mole-rats were introduced without a period of acclimation to each other or to the experimental set-up. The results reveal that both the length of acquaintance between a pair of mole-rats and their own control of the timing of encounters are the most significant factors in reducing aggression and stress. Courtship in blind mole-rats is a lengthy process during which the animals gradually become accustomed to one another, which leads to a reduction of aggression and the initiation of positive "contact movements," eventually enabling copulation to occur. Minimal disturbance by the researcher and initiation of encounters by the mole-rats themselves appear to be the factors that led to a successful mating, pregnancy, and, 34 days later, to the female giving birth and rearing the pups in captivity.

Youth Assets and Sexual Risk Behavior: Differences Between Male and Female Adolescents

2009 ◽  
Vol 37 (3) ◽  
pp. 343-356 ◽  
Author(s):  
Trisha Mueller ◽  
Lorrie Gavin ◽  
Roy Oman ◽  
Sara Vesely ◽  
Cheryl Aspy ◽  
...  
Keyword(s):  
Sexual Risk ◽  
Sexual Intercourse ◽  
Sexual Behaviors ◽  
Role Models ◽  
Female Adolescents ◽  
Male And Female ◽  
External Resources ◽  
Use Of Time ◽  
Males And Females ◽  
Youth Assets

Youth internal assets and external resources are protective factors that can help youth avoid potentially harmful behaviors. This study investigates how the relationship between youth assets or resources and two sexual risk behaviors (ever had sex and birth control use) varied by gender. Data were collected through in-home interviews from parent—adolescent dyads, including 1,219 females and 1,116 males. Important differences exist between male and female adolescents. Females with the nonparental role models or the family communication resource were more likely to report never having had sexual intercourse than were females without the resources. Among males, the aspirations for the future and responsible choices assets were associated with never having had sexual intercourse. Males and females had two assets or resources in common that were protective of never having had sex: peer role models and use of time (religion). Considering which youth assets and resources are more likely to positively influence sexual behaviors of males and females may be important when planning prevention programs with youth.

Come-ons and Put-offs: Unmarried Students' Strategies for Having and Avoiding Sexual Intercourse

1979 ◽  
Vol 4 (2) ◽  
pp. 194-211 ◽  
Author(s):  
Naomi B. McCormick
Keyword(s):  
College Students ◽  
Sexual Intercourse ◽  
Sex Role ◽  
Questionnaire Study ◽  
Sexual Encounter ◽  
Sex Role Attitudes ◽  
Men And Women ◽  
Male And Female ◽  
Sexual Encounters

One-hundred and twenty male and 109 female unmarried college students participated in a questionnaire study of actual and expected male-female differences in the use of 10 strategies for having and avoiding sexual intercourse. As predicted, both men and women viewed strategies for having sex as used predominantly by males and strategies for avoiding sex as used predominantly by females. However, sex-role attitudes were unrelated to students' expectations of sexual encounters. Both traditional and profeminist students expected that strategies for having sex would be used predominantly by males and strategies for avoiding sex would be used predominantly by females. It appeared that students still stereotyped having sex as a male goal and avoiding sex as a female goal. Men and women were unexpectedly similar in their personal strategies for influencing a sexual encounter. Both men and women reported using more indirect strategies to have sex and more direct strategies to avoid having sex. These findings suggest that when men and women share the same goals (such as having or avoiding sex), expected differences between male and female influencing agents disappear

scholarly journals Description of the reproductive behavior of Symphysodon aequifasciatus (Cichlidae) in captivity

2016 ◽  
Vol 46 (4) ◽  
pp. 433-438 ◽  
Author(s):  
Douglas da Cruz MATTOS ◽  
Rafaela SCRENCI-RIBEIRO ◽  
Leonardo Demier CARDOSO ◽  
Manuel Vazquez Vidal JUNIOR
Keyword(s):  
Parental Care ◽  
Reproductive Behavior ◽  
Amazon Basin ◽  
Color Change ◽  
Biparental Care ◽  
Reproductive Process ◽  
Second Stage ◽  
In Captivity ◽  
Two Stages ◽  
Couple Formation

ABSTRACT The blue discus (Symphysodon aequifasciatus) is often sold for ornamental purposes. It is a neotropical cichlid from South America, which is native to the rivers of the Amazon basin of Brazil, Peru and Colombia. The purpose of this study was to characterize the reproductive behavior of S. aequifasciatus and identify features that can later be used by breeders to facilitate the handling and reproduction of this species in captivity. The experiment was divided into two stages: the first dealt with partner selection and couple formation to observe the behaviors of territoriality, pursuing, fleeing, biting, stay, protecting and cleaning of the substrate. The second stage documented mating behavior, nesting and parental care, to observe vibration, spawning, permanence with the offspring, aeration of eggs, cleaning of spawning, color change and shift-taking in parental care. The results of the study allowed identifying disputes for and establishment of territory, as well as the selection and cleaning of the substrate for spawning performed by both sexes. The parental care was observed from spawning in the substrate until the care for the larvae. It was found that the reproductive success of this species is closely linked to biparental care observed during the entire reproductive process and early stages of the hatchings.

scholarly journals Brief Mating Behavior at Dawn and Dusk and Long Nocturnal Matings in the Butterfly Melanitis leda

2020 ◽  
Vol 33 (2-4) ◽  
pp. 138-147
Author(s):  
Freerk Molleman ◽  
Sridhar Halali ◽  
Ullasa Kodandaramaiah
Keyword(s):  
Mating System ◽  
Mating Behavior ◽  
South India ◽  
Territorial Defense ◽  
Warm Up ◽  
Male Territoriality ◽  
In Captivity ◽  
In The Wild ◽  
The Common ◽  
Insight Into

Abstract Information on the mating system of an insect species is necessary to gain insight into sexual selection and population structure. Male territoriality of the common evening brown butterfly Melanitis leda has been studied in the wild, but other aspects of its mating system remain largely unknown. For a population of M. leda in South India, we observed male-male and male-female interactions in captivity, measured mating duration and spermatophore mass, and also determined the degree of polyandry in the wild. We found that mating behavior takes place for short periods of time around dawn and dusk. Our observations corroborate that males compete in aerial combats (twirling) and interfere with mating pairs. In the morning, they may use shivering to warm up. Females can twirl with males and refuse mating by pointing their abdomens upwards or by flying away. Males court females by fluttering their wings while perched behind females, and then initiate copulation by curling their abdomens ca. 180 degrees sideways to make genital contact. While in the morning, matings lasted on average one hour and twenty-three minutes and never exceeded three hours, in the evening, matings could be of similar duration, but 42% of butterflies only separated when dawn was approaching. However, such long nocturnal matings did not result in heavier spermatophores. The first spermatophore of a male tended to be larger than subsequent spermatophores. Together with previous studies on this species, our findings suggest that males compete mainly through territorial defense (as reported before), courtship performance, and interference, and to a lesser extent by providing spermatophores, while females exert some control over the mating system by the timing of their receptivity and mate choice.

scholarly journals Reproductive Behavior of Pacific Cod in Captivity

1996 ◽  
Vol 62 (2) ◽  
pp. 222-228 ◽  
Author(s):  
Yasunori Sakurai ◽  
Tsutomu Hattori
Keyword(s):  
Reproductive Behavior ◽  
Pacific Cod ◽  
In Captivity

Reproductive behavior of the masson pine caterpillar, Dendrolimus punctatus (Lepidoptera: Lasiocampidae) under laboratory conditions

2016 ◽  
Vol 51 (2) ◽  
pp. 205-212 ◽  
Author(s):  
Kang-Nian Zhou ◽  
Shi-Yu Zhang ◽  
Ju-Ping Zeng ◽  
Dan Luo ◽  
Xing-Ping Liu
Keyword(s):  
Reproductive Behavior ◽  
Masson Pine ◽  
Laboratory Conditions

Premating and Mating Behavior of the Dungeness Crab (Cancer magister Dana)

1966 ◽  
Vol 23 (9) ◽  
pp. 1319-1323 ◽  
Author(s):  
C. Dale Snow ◽  
John R. Neilsen
Keyword(s):  
Mating Behavior ◽  
Dungeness Crab ◽  
Continuous Observation ◽  
Cancer Magister ◽  
Male And Female ◽  
Male Crab

A male and female Dungeness crab (Cancer magister Dana) were kept under continuous observation in an aquarium to observe the premating embrace, female ecdysis, and mating. The male held the female in premating embrace from June 10 until June 18, 1965, when she molted. The male allowed the female to reverse her position from the premating embrace, sternum to sternum, to that of female carapace to male sternum only after she became aggressive. The male never allowed the female to escape from his control while she molted. Copulation occurred 1 hr and 32 min after female ecdysis, when the new exoskeleton had firmed somewhat, and the male carried the female in a postmating embrace for 2 days.Extensive wear on the chelipeds of male crabs may reflect prolonged periods in the premating embrace and stroking of the female by the male rather than matings with several females. The male crab probably becomes aware of the female's readiness to molt by her aggressive pinching of maxillae and eyestalks.

Sign in / Sign up

Export Citation Format

Share Document