scholarly journals Identification key for the early juvenile stages of the most important invasive gobies in European freshwaters – A tool for daily practice

2021 ◽  
Author(s):  
Fenja Tietler ◽  
Sylvia Breiden ◽  
Alexander Didenko ◽  
Svenja Storm ◽  
Jost Borcherding
Keyword(s):  
Daily Practice ◽  
Identification Key ◽  
Early Juvenile ◽  
Juvenile Stages

scholarly journals Decapodid and early juvenile development in the protandrous shrimp Campylonotus vagans (Crustacea: Decapoda: Caridea), with notes on larval morphology

2003 ◽  
Vol 83 (1) ◽  
pp. 103-109 ◽  
Author(s):  
Sven Thatje ◽  
Gustavo A. Lovrich
Keyword(s):  
Low Temperatures ◽  
Juvenile Stage ◽  
Tierra Del Fuego ◽  
Caridean Shrimp ◽  
Early Juvenile ◽  
Morphological Variations ◽  
Sexual Determination ◽  
Juvenile Stages ◽  
Two Stages ◽  
Juvenile Development

The decapodid and first two juvenile stages of the caridean shrimp Campylonotus vagans from the Subantarctic Beagle Channel (Tierra del Fuego, Argentina) are described and illustrated in detail. The complete larval and early juvenile development of this species from rearings under controlled laboratory conditions were analysed. Zoeal morphology in two stages of an abbreviated development was identical to a description from plankton and hatched larvae of a previous work, and therefore we only compare and discuss slight morphological variations in this study. The first juvenile is large and already resembles some features of adults, lacking all ventral rostral and the fourth dorsal rostral spine only which appears in the following stage, and the second pereiopod not yet being as predominant as in adults. Sexual determination is not yet possible up to the described second juvenile stage. The abbreviated larval development in a Subantarctic shrimp species is discussed as an adaptation to low temperatures and pronounced seasonality.

scholarly journals Appropriate feeding for early juvenile stages of eunicid polychaete Marphysa sanguinea

2017 ◽  
Vol 20 (1) ◽  
Author(s):  
Kyeong Hun Kim ◽  
Byoung Kwon Kim ◽  
Sung Kyun Kim ◽  
War War Phoo ◽  
B. A. Venmathi Maran ◽  
...  
Keyword(s):  
Early Juvenile ◽  
Juvenile Stages ◽  
Marphysa Sanguinea

Delayed determination of claw laterality in lobsters loss of target

Development ◽  
1989 ◽  
Vol 107 (3) ◽  
pp. 547-551
Author(s):  
C.K. Govind ◽  
J. Pearce
Keyword(s):  
Critical Period ◽  
Early Juvenile ◽  
Juvenile Stages ◽  
Juvenile Development

Lateralization of the paired claws into a major crusher minor cutter type is determined during the 4th and 5th juvenile development of the lobster, Homarus claws during this critical period delays the laterality until the 6th stage when regenerate claws Continued loss into the 6th stage, and beyond, laterality, resulting in lobsters with paired cutter critical period for determining claw laterality may extended for a brief time to cater for claw loss, common in these early juvenile stages.

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