scholarly journals Adult male coatis play with a band of juveniles

2013 ◽  
Vol 73 (2) ◽  
pp. 353-355 ◽  
Author(s):  
CJ Logan ◽  
JT Longino

This study examined the play behaviour in one group of coatis (Nasua narica) at La Selva Biological Station in Costa Rica. We incidentally found adult males playing with juvenile coatis, and conducted post-hoc analyses to investigate this interaction. Coati groups consist of adult females and juveniles of both sexes until male juveniles reach two years of age and leave the band to become solitary. Adult males only tolerate juveniles for a brief period during breeding season when the males court females to mate. Outside of the breeding season, adult males are known to prey on juveniles. In this study, when adult males were present with the band, play occurred more than was expected by chance, and adult males engaged in many of these play bouts. Because the mechanisms driving infanticidal behaviour are not well understood, and adult male coatis show a range of behaviours from infanticide to highly affiliative interactions with juveniles, using coatis as a model system may elucidate mechanisms underlying infanticide.

Zootaxa ◽  
2020 ◽  
Vol 4755 (1) ◽  
pp. 129-138
Author(s):  
WILLIAM A. HABER

Telebasis rojinegra sp. nov. was recorded from ponds at La Selva Biological Station and three other sites in the Caribbean lowlands of Costa Rica. The new species appears closely related to T. boomsmae Garrison, 1994 recorded from Mexico, Belize and Costa Rica, T. collopistes Calvert, 1902 ranging from Mexico to Honduras, and T. garrisoni Bick & Bick, 1995 from South America, but differs in having straighter and more elongate paraprocts and a half black pattern on the rear of the head. The female mesostigmal plates are also distinct from the above species. Telebasis rojinegra was active on the water primarily during afternoon hours. 


1965 ◽  
Vol 43 (3) ◽  
pp. 475-487 ◽  
Author(s):  
E. O. Höhn ◽  
A. K. Sarkar ◽  
A. Dzubin

Mallards and domestic ducks are conspecific. Relative adrenal weight is similar in newly hatched mallards and domestic ducks. Immature mallards have higher relative adrenal weights than domestic ducks of similar age. Adult female mallards also have higher relative adrenal weights and a higher proportion of cortex in the adrenal than adult female domestic ducks, but adult males of the two strains fail to show these differences.Adrenal weight is related to testicular weight in mallards and domestic ducks, but no correlation is evident between adrenal weight and weight of the ovary and oviduct in mallards. Mallards show no adrenal weight sex differences at any of the three ages sampled. A seasonal adrenal weight cycle is apparent in both sexes of the mallard with a weight increase related to the breeding season and another increase during the autumn and winter.The higher relative adrenal weights of (immature and adult female) mallards compared to those of domestic ducks are attributed to the mallards' greater exposure to stress. It is suggested that this effect operates also in adult male mallards but is obscured in the comparison with adult male domestic ducks because in the latter, which have much higher testicular weights, another factor responsible for the correlation between adrenal and testicular weight as noted above makes for increased adrenal weights.


2021 ◽  
Vol 50 (10) ◽  
pp. 2877-2884
Author(s):  
Zahid Farooq ◽  
Irfan Baboo ◽  
Muhammad Younas ◽  
Khalid Javed Iqbal ◽  
Sana Asad ◽  
...  

Management practices/strategies to re-modulate the wild behaviour of animal species could increase their number in natural areas. The captive herd of hog deer showed slight changes from wild behaviour due to captive stress with no alteration in wild behaviour pattern except captive stress. Adult males (6), adult females (6) and fawns (6) were selected and observed round the clock for thirty days across season after one-hour interval on each activity. All subjects in hotter part of the day spent more time in sitting and rest. While, few hours of night in sleeping, resting and rumination. Fawn spent more time in sitting, resting, and hiding compared to adults. During wandering, they also spent some time in standing. It was noticed that all hog deer in herd not slept together but few of them remain active. Only male fighting was observed and maximum was noticed in August and September during breeding season. Hog deer were mainly crepuscular in feeding with irregular short intakes, and grazing on grasses present in enclosure. This study provides guideline to rehabilitate wild hog deer for better breeding management, conservation and raising practices.


Zootaxa ◽  
2020 ◽  
Vol 4779 (3) ◽  
pp. 409-418 ◽  
Author(s):  
BRIAN W. BAHDER ◽  
MARCO A. ZUMBADO ECHAVARRIA ◽  
EDWIN A. BARRANTES BARRANTES ◽  
GERNOT KUNZ ◽  
ERICKA E. HELMICK ◽  
...  

An ongoing survey to document planthopper diversity on palms (Arecaceae) is being conducted in Costa Rica. During these efforts a new species of derbid planthopper belonging to the genus Agoo was found on Astrocaryum alatum Loomis in the Heredia province at La Selva Biological Station and is described here as Agoo luzdenia Bahder & Bartlett sp. n., bringing the genus to four described taxa—A. dahliana, A. luzdenia Bahder & Bartlett sp. n., A rubrimarginata, and A. xavieri. Sequence data for the cytochrome c oxidase subunit I (COI) and 18S genes was generated for the novel taxon and strongly supports its placement in the genus Agoo. 


2006 ◽  
Vol 33 (2) ◽  
pp. 89-99 ◽  
Author(s):  
RANDALL S. MOORMAN

Many conservation organizations have attempted to reduce local threats to protected areas (PAs) by providing environmental education programmes in neighbouring communities. There is a great need to understand the effectiveness of these programmes in promoting support for PAs and ultimately reducing threats to biodiversity. La Selva Biological Station, a private PA in Costa Rica, has become increasingly threatened by illegal hunting in the PA and deforestation and land degradation in surrounding areas. The Station has responded with several outreach projects including an annual free visiting day. This study used a survey instrument to evaluate the benefits of local residents visiting La Selva. Specifically, three questions were asked: (1) is there a difference in ecological knowledge of local residents among residents who have visited the Station and those that have not; (2) does an increase in knowledge relate to a perceived benefit from the PA; and (3) does recognition of a perceived benefit among local people result in fewer residents admitting to hunting or desiring to hunt in the PA? This study showed that those residents who had visited the station had a greater understanding of ecological concepts than those residents that had never been to the station, suggesting that such visits provided educational opportunities. Men also had greater ecological knowledge than women. Additionally, residents were more likely to value the PA if they had a greater knowledge of local ecology and conservation. Increased knowledge and recognition of perceived benefit however, do not necessarily translate into lifestyle changes that benefit conservation; no relationship was detected between residents who stated they benefited from the PA and those who said they did not have a desire to hunt, but younger respondents were more likely to express an interest in hunting than older respondents. The results presented here suggest that protected areas generally may benefit from visitation by local residents. However, further study is needed to determine if such outreach activities actually decrease local threats to conservation efforts, such as hunting.


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