scholarly journals Estimating the survival of unobservable life stages for a declining frog with a complex life history

Ecosphere ◽  
2021 ◽  
Vol 12 (2) ◽  
Author(s):  
Jonathan P. Rose ◽  
Sarah J. Kupferberg ◽  
Clara A. Wheeler ◽  
Patrick M. Kleeman ◽  
Brian J. Halstead
Keyword(s):  
Life History ◽  
Life Stages ◽  
Complex Life History

Post-Metamorphic Carry-Over Effects in a Complex Life History: Behavior and Growth at Two Life Stages in an Amphibian,Anaxyrus fowleri

Copeia ◽  
2018 ◽  
Vol 106 (1) ◽  
pp. 77-85 ◽  
Author(s):  
Katharine T. Yagi ◽  
David M. Green
Keyword(s):  
Life History ◽  
Life Stages ◽  
Complex Life History ◽  
Carry Over

Distribution and life history of caridean shrimps in regulated lowland rivers in southern Australia

2004 ◽  
Vol 55 (3) ◽  
pp. 295 ◽  
Author(s):  
A. J. Richardson ◽  
J. E. Growns ◽  
R. A. Cook
Keyword(s):  
Life History ◽  
Life Stages ◽  
Lowland Rivers ◽  
Flow Alteration ◽  
Eastern Australia ◽  
History Of ◽  
Paratya Australiensis ◽  
Juvenile Stages ◽  
Shrimp Abundance ◽  
Large Adult

Caridean shrimps are an integral component of lowland river ecosystems in south-eastern Australia, but their distributions may be affected by flow alteration. Monthly shrimp samples were collected from slackwaters in three hydrologically distinct sections of the heavily regulated Campaspe River and the less regulated Broken River for three consecutive years. The distributions of Paratya australiensis, Caridina mccullochi and Macrobrachium australiense, along with their life history in river sections with different hydrology are outlined. Paratya australiensis and M. australiense occurred in all sections, but C. mccullochi was absent from sections of the Campaspe River that received irrigation flows during summer/autumn. Shrimp larvae were most abundant in summer (December–February) and juvenile recruitment continued through to mid autumn (April). Breeding and recruitment of P. australiensis occurred for longer than other shrimps. Apart from large adult and berried M. australiense, all life stages of shrimps commonly occurred in slackwaters, particularly the larval and juvenile stages. Irrigation flows in summer/autumn probably adversely affect the size, extent and arrangement of slackwaters, at a time when they may be critical habitats for C. mccullochi larval development and recruitment. Dams and weirs in the Campaspe River may have influenced shrimp abundance and the timing of breeding.

THE STAGES OF ERANNIS VANCOUVERENSIS (LEPIDOPTERA: GEOMETRIDAE) AND LIFE HISTORY NOTES

1973 ◽  
Vol 105 (4) ◽  
pp. 605-612 ◽  
Author(s):  
David Evans
Keyword(s):  
British Columbia ◽  
Life History ◽  
Virus Disease ◽  
Pupal Stage ◽  
Early Spring ◽  
Deciduous Trees ◽  
Life Stages ◽  
Larval Instars ◽  
Central California ◽  
Young Leaves

AbstractErannis vancouverensis Hulst occurs from northern British Columbia to central California, and has been occasionally reported at infestation levels. The larvae feed on young leaves of several species of deciduous trees; winter is passed in the egg or sometimes in the pupal stage; adults emerge during late autumn or occasionally during winter or early spring; females are wingless. The life stages, including larval instars, are described here in detail. Virus disease and parasitism by tachinid flies help control the species.

Studies on the life history and life stages of the black cowpea moth, Cydia ptychora

1981 ◽  
Vol 1 (02) ◽  
pp. 151-160
Author(s):  
J. I. Olaifa ◽  
A. E. Akingbohungbe
Keyword(s):  
Life History ◽  
Life Stages ◽  
Cydia Ptychora

BIOLOGY OF THE MAPLE TRUMPET SKELETONIZER, EPINOTIA ACERIELLA (LEPIDOPTERA: OLETHREUTIDAE), IN NEW YORK

1973 ◽  
Vol 105 (3) ◽  
pp. 463-470 ◽  
Author(s):  
Wilfred A. Côté ◽  
Douglas C. Allen
Keyword(s):  
New York ◽  
Life History ◽  
Feeding Behavior ◽  
Natural Enemies ◽  
Life Stages ◽  
History Of

AbstractThe life history of Epinotia aceriella (Clemens) is discussed and the life stages described. Information is presented on feeding behavior, distribution, hosts, and natural enemies. Control recommendations are made.

Maturation, reproduction and early life history of anglerfish Lophius piscatorius in Faroese waters

2015 ◽  
Vol 60 ◽  
pp. 114 ◽  
Author(s):  
Lise H. Ofstad ◽  
Torstein Petersen ◽  
Petur Steingrund
Keyword(s):  
Life History ◽  
Early Life ◽  
Early Life History ◽  
Nursery Ground ◽  
Life Stages ◽  
Morphological Transformation ◽  
Spawning Areas ◽  
History Of ◽  
Males And Females ◽  
First Maturity

<p>Maturation, reproduction and early life history of <em>Lophius piscatorius </em>was investigated in Faroese waters. Length at first maturity (L50) was 58 cm for males and 84 cm for females, corresponding to an age of about four years for males and seven years for females. The proportions of females and males were similar in fish less than 55 cm long, and were skewed towards more males in medium sized fish (55–75  cm).  Females  were  predominant  in the larger fish (&gt; 85 cm). Observations of spawning males and females, egg ribbons and pelagic anglerfish larvae, suggest that the main spawning season is from February to April and the spawning area seems to be southwest of the Faroe Plateau and in the Faroe Bank area. The Faroe Plateau probably serves as a nursery ground for juvenile anglerfish. Morphological transformation from larvae to juveniles occurred when the fish were about 7–9 cm long and they settled to the bottom when they were about 11 cm long. Thus, all life stages, as well as nursery areas, spawning areas and feeding areas of anglerfish are found in Faroese waters, indicating a separate stock in the area.</p>

FORMULATION AND ESTIMATION OF THE EFFECTIVE SIZE OF STAGE-STRUCTURED POPULATIONS IN FRITILLARIA CAMTSCHATCENSIS, A PERENNIAL HERB WITH A COMPLEX LIFE HISTORY

Evolution ◽  
2000 ◽  
Vol 54 (6) ◽  
pp. 2007 ◽  
Author(s):  
Katsuei Yonezawa ◽  
Eiichiro Kinoshita ◽  
Yasuyuki Watano ◽  
Hiroko Zentoh
Keyword(s):  
Life History ◽  
Structured Populations ◽  
Effective Size ◽  
Perennial Herb ◽  
Complex Life History

scholarly journals Plant density and life history traits of Aconitum spicatum in North-central Nepal: effects of elevation and anthropogenic disturbances

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e7574
Author(s):  
Deep J. Chapagain ◽  
Henrik Meilby ◽  
Suresh K. Ghimire
Keyword(s):  
Life History ◽  
Life History Traits ◽  
Plant Density ◽  
Elevation Gradient ◽  
Seed Mass ◽  
Anthropogenic Disturbances ◽  
Life Stages ◽  
Conservation Area ◽  
North Central ◽  
Central Nepal

Increasing cross-border trade of medicinal and aromatic plants (MAPs) has put heavy pressure on a considerable number of species in the Himalayas. One of the threatened species in Nepal is Aconitum spicatum. Unfortunately for this species and for many others, our knowledge on population ecology and performance across the distribution range is insufficient, hindering the formulation of species-specific management plans. We therefore studied density and population structure of A. spicatum and assessed variation in its life history traits among three populations (subalpine, lower alpine and alpine) along an elevation gradient (3,000–4,200 m a.s.l.) in Annapurna Conservation Area, north-central Nepal. The results show that human disturbances and topographic factors contributed to the variation in density and life history traits. The overall density ranged between 0.56 ± 0.09 (Mean ± SE) and 2.48 ±  0.24 plants/m2 with highest mean density in the lower alpine and lowest in the subalpine population. The subalpine population was also characterized by lower investment in reproductive structures with lowest seed mass and low seed viability and fecundity. Among the environmental variables tested, harvesting, animal droppings and fire appeared to be the most important factors affecting density of different life stages of A. spicatum. The prevailing harvesting pattern is destructive as it involves uprooting of the whole plant and this appears to be a main reason for low recruitment and reduced density of the subalpine population. The level of disturbance decreased with increasing elevation. In terms of reproductive effort, the alpine population performed best. Our results indicate that the viability of A. spicatum populations depends on controlling over-harvesting and pre-mature harvesting of tubers and protecting younger life stages from grazing, trampling and fire. We therefore recommend that when formulating management guidelines, measures aiming to mitigate such anthropogenic disturbances should be considered.

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