摘要:

In an attempt to provide background information that may lead to a more comprehensive understanding of the genusLiolaemus, the paper documents some basic features of the autecology ofLiolaemus nitidus.The study was carried out at two typical localities whereL. nitidusis found: at the coast north of Santiago de Chile, and at the Andes ranges east of Santiago. The following parameters were investigated: microhabitat utilization, preferred body temperatures, diet, weight of gonads and of fat bodies, and frequency of regenerated tails. The main findings reported are:1.Liolaemus nitidusis preferentially a rock‐dweller, although, when available, it can also be found perching on branches of the bromeliadPuya chilensis.2.Preferred field body temperatures, evaluated with a quick‐registering Schultheis thermometer, indicate thatL. nitidushas a preferendum of about 35.4°C. This mean preferred body temperature is not statistically different from the laboratory preferendum reported in the literature.3.The diet ofL. nitiduswas found to vary with body size. Small individuals tend to eat mostly insects, whereas larger individuals tend to have more plant material in their guts. Total gut content is nevertheless relatively heavier for small than for large individuals. These facts are interpreted in the light of previous results obtained withLiolaemusspecies, and in relation to food availability. Regarding food availability, the above results are consistent with the hypothesis that arthropods are relatively scarce in the xerophytic areas whereL. nitiduslives, and therefore these lizards complement their diet with plant material. Arthropod content of the guts was analyzed by size and taxonomic order. The findings are that mean prey size, and size of the largest and of the smallest prey in each stomach tend to be positively correlated with body size of the lizard, thus suggesting prey selectivity. On the other side, the orders most preyed upon byL. nitidusare Coleopterans, Hymenopterans (fundamentally ants), and Homopterans.4.Correlations between either relative gonad weight or relative weight of the fat bodies, versus dry weight of the lizards are significant and positive. These results suggest thatL. nitidusis a relatively K‐selected species, where there is a premium for somewhat delayed reproduction and perhaps larger clutches. Heavier fat bodies in the mountain population are interpreted in terms of length of the growing season and different needs to accumulate energy reserves for the unfavorable season.5.Frequency of regenerated tails is greater in adults than in juveniles, but does not differ between sexes, suggesting that risk of predation would be more associated with the span of time the lizard is exposed to the environment than with differential behavior of males and females.

ISSN:0165-0521    

DOI:10.1080/01650528009360569

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

摘要:

A revision of the species of theProischioscia‐Ischioscia‐grouprevealed the necessity to synony‐mize the genusProischiosciaVandel, 1968 withIschiosciaVerhoeff, 1928. The following previously described species are accepted and included in the genusIschioscia: Ischioscia lobiferaVerhoeff,1928,Ischioscia amazónicaLemos de Castro, 1955,Proischioscia andinaVandel, 1968,Ischioscia bolivariVandel, 1968, andProischioscia sturmiVandel, 1972. Four new species are described:I. stenocarpa, I. hanagarthiandI. longicaudafrom Peru, andI. irmlerifrom Brazil. An analysis of the generic and specific characters is given from a viewpoint of phylogenetic systematics.

ISSN:0165-0521    

DOI:10.1080/01650528009360570

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

摘要:

Three species of Tanaidacea were found on the ¡ntertidal and shallow infralittoral at Enseada do Flamengo, Ubatuba, southeastern Brazil. Their vertical and horizontal distributions, as well as their density, seasonal variation and constancy are studied in relation to substrate and degree of exposure to wave action.

ISSN:0165-0521    

DOI:10.1080/01650528009360571

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

摘要:

During two visits to Guatemala in 1974 and 1975 observations were made on the fauna inEichhomiagrowth of the small lake “Laguna Chichoj”;. Chemical and physical data and faunistic finds are reported. Particular attention was paid to the water miteArrenurus (Arrenurus) valenciusMARSHALL, 1919. Adults of this species occur commonly in theEichhorniagrowth. The larvae parasitize adultIschnura ramburi crédula(Zygoptera, Odonata). This fits the known pattern according to which nearly all species of the subgenusArrenurusare parasites of dragonflies belonging to both the Zygoptera as well as Anisoptera (Münchberg 1935, Mitchell 1959, Böttger 1965, Cassagne‐Méjean 1966, Cook 1974, Stechmann 1977). Also the first mentions in the literature on tropical species of the subgenusArrenuruspointed to Odonata as specific hosts (Münchberg 1958, 1959, 1960).

ISSN:0165-0521    

DOI:10.1080/01650528009360572

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

摘要:

An illustrated key to separate all the polychaete families reported to present date within the limits of the Chilean sea is presented. For practical purposes the arbitrary grouping into Polychaeta Errantia and Polychaeta Sedentaria has been followed. The first group is represented by 27 families and the second group comprises 26 families. In addition, a brief description of some morfological features used in taxonomy of polychaetes and suggestions on fixation and preservation of specimens are given.

ISSN:0165-0521    

DOI:10.1080/01650528009360573

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

ISSN:0165-0521    

DOI:10.1080/01650528009360574

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

ISSN:0165-0521    

DOI:10.1080/01650528009360568

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor