Population Structure and Reproduction
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Ecological Effects of the Mass Occurrence of the Ponto-Caspian Invader, Hemimysis Anomala G.O
Hydrobiologia 394: 233-248, 1999 © 1999 Kluwer Academic Publishers. Printed in the Netherlands Ecological effects of the mass occurrence of the Ponto-Caspian invader, Hemimysis anomala G.O. Sars, 1907 (Crustacea: Mysidacea), in a freshwater storage reservoir in the Netherlands, with notes on its autecology and new records Ketelaars H.A.M.1,*, F.E. Lambregts-van de Clundert1, C.J. Carpentier1, A.J. Wagenvoort1 & W. Hoogenboezem2 1Biological Laboratory, Water Storage Company Brabantse Biesbosch, P.O. Box 61, NL-4250 DB Werkendam, The Netherlands 2PWN Water Supply Company North Holland, P.O. Box 5, NL-2060 BA Bloemendaal, The Netherlands E-mail: [email protected] (*author for correspondence) Received 12 December 1998; in revised form 2 February 1999; accepted 25 February 1999 Key words: Hemimysis anomala, Mysidacea, exotic species, Ponto-Caspian, biological invasion, ecological effects Abstract A new Ponto-Caspian invader, the mysid Hemimysis anomala G.O. Sars, 1907 (Crustacea: Mysidacea) was recorded for the first time in the Netherlands in 1997. In the summer of 1998 extremely high den- sities (>6 ind. 1-1) of this neozoon were recorded in one of the Biesbosch reservoirs (Honderd en Dertig). This high abundance can not be explained by a recent invasion. Either H. anomala reached the Nether- lands via the River Rhine, probably aided by shipping, or through transport with ballast water from the Baltic or Black Sea. The invasion had dramatic effects on the zooplankton composition and abundance: from the end of August onwards hardly any Anomopoda, Ostracoda, Rotifera and invertebrate predators (Leptodora kindti and Bythotrephes longimanus) were present. -
C:\Documents and Settings\Leel\Desktop\WA 2-15 DRP
DRAFT DETAILED REVIEW PAPER ON MYSID LIFE CYCLE TOXICITY TEST EPA CONTRACT NUMBER 68-W-01-023 WORK ASSIGNMENT 2-15 July 2, 2002 Prepared for L. Greg Schweer WORK ASSIGNMENT MANAGER U.S. ENVIRONMENTAL PROTECTION AGENCY ENDOCRINE DISRUPTOR SCREENING PROGRAM WASHINGTON, D.C. BATTELLE 505 King Avenue Columbus, Ohio 43201 TABLE OF CONTENTS 1.0 EXECUTIVE SUMMARY ....................................................... 1 2.0 INTRODUCTION .............................................................. 2 2.1 DEVELOPING AND IMPLEMENTING THE ENDOCRINE DISRUPTOR SCREENING PROGRAM (EDSP).......................................... 2 2.2 THE VALIDATION PROCESS............................................. 2 2.3 PURPOSE OF THE REVIEW ............................................. 3 2.4 METHODS USED IN THIS ANALYSIS...................................... 4 2.5 ACRONYMS AND ABBREVIATIONS ....................................... 5 3.0 OVERVIEW AND SCIENTIFIC BASIS OF MYSID LIFE CYCLE TOXICITY TEST ........... 6 3.1 ECDYSTEROID SENSITIVITY TO MEASURED ENDPOINTS ................... 9 4.0 CANDIDATE MYSID TEST SPECIES ............................................ 11 4.1 AMERICAMYSIS BAHIA ................................................ 12 4.1.1 Natural History ................................................... 12 4.1.2 Availability, Culture, and Handling .................................. 12 4.1.3 Strengths and Weaknesses ....................................... 13 4.2 HOLMESIMYSIS COSTATA ............................................. 13 4.2.1 Natural History ................................................ -
Iep Newsletter
n Interagency Ecological Program for the San Francisco Estuary n IEP NEWSLETTER VOLUME 30, NUMBER 1, 2017 OF INTEREST TO MANAGERS .......................................................................................................................... 2 HIGHLIGHTS .......................................................................................................................................................... 3 All Hands on Deck: Revamping the Discrete Water Quality Blueprints of the IEP’s Environmental Monitoring Program .......................................................................................................................... 3 Summary of DWR Old-Middle River Turbidity Transects ........................................................................................ 5 STATUS AND TRENDS .......................................................................................................................................... 9 Zooplankton Monitoring 2013–2015 ......................................................................................................................... 9 CONTRIBUTED PAPERS .................................................................................................................................... 21 Evaluation of Adding Index Stations in Calculating the 20-mm Survey Delta Smelt Abundance Index ................ 21 Evaluating Potential Impact of Fish Removal at the Salvage Facility as part of the Delta Smelt Resiliency Strategy .............................................................................................................................. -
Labidesthes Sicculus
Version 2, 2015 United States Fish and Wildlife Service Lower Great Lakes Fish and Wildlife Conservation Office 1 Atherinidae Atherinidae Sand Smelt Distinguishing Features: — (Atherina boyeri) — Sand Smelt (Non-native) Old World Silversides Old World Silversides Old World (Atherina boyeri) Two widely separated dorsal fins Eye wider than Silver color snout length 39-49 lateral line scales 2 anal spines, 13-15.5 rays Rainbow Smelt (Non -Native) (Osmerus mordax) No dorsal spines Pale green dorsally Single dorsal with adipose fin Coloring: Silver Elongated, pointed snout No anal spines Size: Length: up to 145mm SL Pink/purple/blue iridescence on sides Distinguishing Features: Dorsal spines (total): 7-10 Brook Silverside (Native) 1 spine, 10-11 rays Dorsal soft rays (total): 8-16 (Labidesthes sicculus) 4 spines Anal spines: 2 Anal soft rays: 13-15.5 Eye diameter wider than snout length Habitat: Pelagic in lakes, slow or still waters Similar Species: Rainbow Smelt (Osmerus mordax), 75-80 lateral line scales Brook Silverside (Labidesthes sicculus) Elongated anal fin Images are not to scale 2 3 Centrarchidae Centrarchidae Redear Sunfish Distinguishing Features: (Lepomis microlophus) Redear Sunfish (Non-native) — — Sunfishes (Lepomis microlophus) Sunfishes Red on opercular flap No iridescent lines on cheek Long, pointed pectoral fins Bluegill (Native) Dark blotch at base (Lepomis macrochirus) of dorsal fin No red on opercular flap Coloring: Brownish-green to gray Blue-purple iridescence on cheek Bright red outer margin on opercular flap -
Neomysis Mercedis Class: Malacostraca Order: Mysidacea a Mysid, Or Opossum Shrimp Family: Mysidae
Phylum: Arthropoda, Crustacea Neomysis mercedis Class: Malacostraca Order: Mysidacea A mysid, or opossum shrimp Family: Mysidae Taxonomy: Neomysis awatschensis, N. Carapace: Not attached dorsally at intermedia, and N. mercedis were considered posterior edge. Anterior lateral angles acute three different species (with distinct (Figs. 1, 3). morphology) from the western Pacific, Rostrum: A short triangle with northwestern Pacific and northeast Pacific obtusely pointed apex, and rounded, “flanged” coasts (Tattersall 1951; Holmquist 1973; corners (Tattersall and Tattersall 1951). A Brand et al. 1993), but have since been medial depression obscures the pointed apex synonymized as N. mercedis (Moldin 2007). (Holmquist 1973). In total size, rostrum is only as long as bases of eyestalks (Tattersall Description and Tattersall 1951) (Figs. 1, 3). Size: Adults range in size from 11 to 17 mm Eyes: On movable stalks and about in length (Banner 1948b). The illustrated 1.5 times as long as broad and with corneas specimens (from the Columbia River estuary) that are expanded, but not separated into two were up to 17 mm long. portions (Fig. 3). Color: Clear body with black Antennae: Long, slender, and multi- chromatophores, although an individual articulate (Fig. 1). caught on eelgrass was yellow green Antennae Scale: (= squama) Long, (Banner 1948b). narrow, about eight times longer than wide General Morphology: Mysids are shrimp- (Banner 1948b; Brandt et al. 1993). The size like crustaceans that are occasionally called of the scale, however, may vary among opossum shrimp due to the female individuals (Holmquist 1973). The scale is marsupium or brood pouch, which is setose all around and is with pointed apex composed of oostegites. -
The Ponto-Caspian Mysid Paramysis Lacustris (Czerniavsky, 1882) Has Colonized the Middle Danube
Knowl. Manag. Aquat. Ecosyst. 2019, 420, 1 Knowledge & © P. Borza et al., Published by EDP Sciences 2019 Management of Aquatic https://doi.org/10.1051/kmae/2018039 Ecosystems www.kmae-journal.org Journal fully supported by Onema SHORT COMMUNICATION The Ponto-Caspian mysid Paramysis lacustris (Czerniavsky, 1882) has colonized the Middle Danube Péter Borza1,2,*, Krisztián Kovács3, Alexandra György4,Julia Katalin Török4 and Ádám Egri2 1 GINOP Sustainable Ecosystems Group, MTA Centre for Ecological Research, Klebelsberg Kuno utca 3, 8237 Tihany, Hungary 2 Danube Research Institute, MTA Centre for Ecological Research, Karolina ut 29-31, 1113 Budapest, Hungary 3 Laboratory for Environmental Protection, Government Office of Győr-Moson-Sopron, Török Ignác utca 68, 9028 Győr, Hungary 4 Department of Systematic Zoology and Ecology, Eötvös Loránd University, Pázmány Péter sétány 1/C, 1117 Budapest, Hungary Abstract – In 2017, the mysid Paramysis lacustris (Czerniavsky, 1882) was found for the first time in the Hungarian Danube section, representing the first psammo-pelophilous Ponto-Caspian peracarid colonizing the Middle Danube. In 2018, a brief survey focusing on this species revealed its presence in a more than 500-km-long river section spanning from Austria (Vienna, river km 1926) to Croatia (Batina, river km 1425). The largest populations of P. lacustris might be formed in reservoirs and slow-flowing stretches, where the appearance of the species might imply a considerable impact in connection with its zooplanktivorous feeding and important role in the diet of fish. Similar to all the other Ponto-Caspian peracarids that have crossed the Middle Danube, P. lacustris can reasonably be expected to continue its spread toward Western Europe in the future. -
Cellular Energy Allocation in the Estuarine Mysid Shrimp Neomysis Integer (Crustacea: Mysidacea) Following Tributyltin Exposure
Journal of Experimental Marine Biology and Ecology 288 (2003) 167–179 www.elsevier.com/locate/jembe Cellular energy allocation in the estuarine mysid shrimp Neomysis integer (Crustacea: Mysidacea) following tributyltin exposure Tim Verslyckea,*, Jordy Vercauterenb, Christophe Devosc, Luc Moensb, Pat Sandrac, Colin R. Janssena a Laboratory of Environmental Toxicology and Aquatic Ecology, Ghent University, J. Plateaustraat 22, B-9000 Ghent, Belgium b Laboratory for Analytical Chemistry, Ghent University, Proeftuinstraat 86, B-9000 Ghent, Belgium c Laboratory for Organic Chemistry, Ghent University, Krijgslaan 281 S4, B-9000 Ghent, Belgium Received 7 October 2002; received in revised form 3 December 2002; accepted 13 December 2002 Abstract Recently, we described the cellular energy allocation (CEA) methodology to asses the effects of abiotic stress on the energy metabolism of the estuarine crustacean Neomysis integer (Crustacea: Mysidacea) [J. Exp. Mar. Biol. Ecol. 279 (2002) 61]. This short-term assay is based on the biochemical assessment of changes in the energy reserves (total carbohydrate, protein and lipid content) and the energy consumption (electron transport activity), and has been shown to be predictive of effects at the population level in daphnids [J. Aquat. Ecosyst. Stress Recovery 6 (1997) 43]. In the present study, the CEA methodology was evaluated using adult N. integer exposed for 96 h to the antifoulant tributyltinchloride (TBTCl). From a range-finding experiment with juvenile N. integer, a 96-h LC50 of 164 ng TBTCl/l was calculated. The energy metabolism of N. integer,as summarized by the CEA, was significantly altered by TBTCl exposure. Mysids exposed to 10, 100 and 1000 ng TBTCl/l consumed less energy and had lower respiration rates (in 10 and 1000 ng TBTCl/l treatments) than the control, resulting in a lower CEA. -
California Fish and Wildlife
California Fish and Wildlife 106 • WINTER 2020 • NUM VOLUME BER 1 Journal for the Conservation and Management of California’s Species and Ecosystems Published Quarterly by the California Department of Fish and Wildlife STATE OF CALIFORNIA Gavin Newsom, Governor CALIFORNIA NATURAL RESOURCES AGENCY Wade Crowfoot, Secretary for Natural Resources FISH AND GAME COMMISSION Eric Sklar, President Jacque Hostler-Carmesin, Vice President Russell Burns, Member Peter S. Silva, Member Samantha Murray, Member Melissa Miller-Henson, Executive Director DEPARTMENT OF FISH AND WILDLIFE Charlton “Chuck” Bonham, Director CALIFORNIA FISH AND WILDLIFE EDITORIAL STAFF Ange Darnell Baker ...........................................................................Editor-in-Chief Lorna Bernard ...........................Office of Communication, Education and Outreach Neil Clipperton, Scott Osborn, Laura Patterson, Joel Trumbo, Dan Skalos, Karen Converse, and Kristin Denryter ....................... Wildlife Branch Felipe La Luz ...................................................................................... Water Branch Jeff Rodzen, Jeff Weaver, and Ken Kundargi ................................. Fisheries Branch Cherilyn Burton ........................................... Habitat Conservation Planning Branch Kevin Fleming ...............................................Watershed Restoration Grants Branch Jeff Villepique, Steve Parmenter ............................................ Inland Deserts Region Paul Reilly and James Ray ................................................................Marine -
Ecology of Mysis Relicta in the Great Lakes
Ecology of Mysis relicta in the Great Lakes Primary Investigator: Steve Pothoven - NOAA GLERL Co-Investigators: Gary Fahnenstiel, Doran Mason- NOAA GLERL Overview The opossum shrimp Mysis relicta is a large zooplankter common in the hypolimnetic waters of the Great Lakes. Mysis play a key role in the transfer of energy between phytoplankton and fish production, and between the benthic and pelagic food webs. The role of Mysis in the food web is complex because Mysis can also affect the size, structure, and abundance of zooplankton, indirectly affecting fish recruitment. Mysis also influence the flow of nutrients and contaminants in aquatic systems. Mysis, along with Diporeia, have historically been among the most important food items for forage fish (Slimy Sculpin, Rainbow Smelt, Alewife) in the Great Lakes. Forage fish in turn support Salmon and Lake Trout fisheries. The two most important commercial fish species in the Great Lakes, Bloater and Lake Whitefish, also consume Mysis. Following drastic declines of Diporeia in Lake Michigan in the late 1990s, the importance of Mysis as a food resource for planktivorous fish increased for most forage fish species (S. Pothoven, unpublished data). The importance of Mysis in the diet of Lake Whitefish, the most important commercial fish species in the Great Lakes, has also increased with declines of Diporeia. Recent work suggests that the abundance of Mysis in Lake Michigan is lower in areas where Diporeia are absent relative to areas where Diporeia is only beginning to decline (S. Pothoven, unpublished data). This difference could be a result of increased fish predation pressure. In order to understand whether Mysis are capable of supporting the increased predation pressure by fish, we need to have an accurate assessment of this species abundance and distribution. -
A Review of Literature on Lake Trout Life History with Notes on Alaskan Management
A REVIEW OF LITERATURE ON LAKE TROUT LIFE HISTORY WITH NOTES ON ALASKAN MANAGEMENT R. Russell Redick , Fishery Biologist Alaska Department of Fish and Game Division of Sport Fish Homer, Alaska ABSTRACT The lake trout, Salvelinus namaycush (Walbaum) , is the largest of the chars and is distinguished from other chars by having more than 100 pyloric caeca. It is restricted to North America and chiefly inhabits oli- gotrophic lakes of Alaska, Canada, and the northern United States. Food availability rather than preference usually determines the diet of lake trout. If forage fish are available, older lake trout are piscivorous while younger fish are chiefly dependent upon invertebrates. The opposum shrimp, Mysis relicta , is important to the diet of young lake trout in many lakes. Spawning occurs over rocky shoals in the fall when water temper- atures cool to 12" C or lower. The eggs typically hatch in 135 to 145 days. The fry move to deeper water after hatching ad reside in rock crevices during their juvenile development. Growth rates and age at maturity are correlated to latitude, with northern populations growing slower and maturing later than southern populations. Most states manage their lake trout populations for recreation. However, limited commercial lake trout fisheries exist in Canada and attempts have been made to establish similar commercial fisheries in Alaska. TAX0 NO MY AND DES CRIPTIO N The lake trout is the largest of the North American chars and has been classified by some ichthyologists as the only species of the genus Cristivomer , with all remaining chars divided into the sub-genera Baione and Salvelinus . -
Standard Operating Procedure for Mysid Analysis
Standard Operating Procedure for Mysid Analysis LG408 Revision 01, February 2015 Table of Contents Section Number Subject Page 1.0……….SCOPE AND APPLICATION………………………………………………………………. 1 2.0……….SUMMARY OF METHOD…………………………………………………….……………. 1 3.0……….SAMPLE COLLECTION AND PRESERVATION………………………….……………. 1 4.0……….APPARATUS…………………………………………………………………………………. 1 5.0……….REAGENTS……………………………………………………………………..……………. 1 6.0……….ANALYTICAL PROCEDURE – MYSID SAMPLE ANALYSIS…………..…………….. 2 7.0……….CALCULATION OF MYSID BIOMASS…………………………………….…………….. 7 8.0……….CALCULATIONS AND REPORTING…………………………………………………….. 7 9.0……….QUALITY CONTROL AUDITS AND METHODS PRECISION………….…..………… 9 10.0……...SAFETY AND WASTE DISPOSAL………………………………………….…………….. 10 11.0……...REFERENCES……………………………………………………………………………….. 10 FIGURES…………………………………………………………………………………...…………….. 12 APPENDIX 1: FORMS………………………………………………………………………………….. 20 Disclaimer: Mention of trade names or commercial products does not constitute endorsement or recommendation of use. Standard Operating Procedure for Mysid Analysis 1.0 SCOPE AND APPLICATION 1.1 This standard operating procedure is used to identify, sex, enumerate, and measure the mysid populations from the Great Lakes. 2.0 SUMMARY OF METHOD 2.1 The method involves macroscopic and microscopic examination of mysid samples. The entire sample is examined for mysids by eye in a sorting tray. Up to 100 mysids are photographed for digital measurement. Marsupia of female mysids are examined under a stereoscopic microscope for number and stage of brood. Gravid females may have been separated -
Microsoft Outlook
Joey Steil From: Leslie Jordan <[email protected]> Sent: Tuesday, September 25, 2018 1:13 PM To: Angela Ruberto Subject: Potential Environmental Beneficial Users of Surface Water in Your GSA Attachments: Paso Basin - County of San Luis Obispo Groundwater Sustainabilit_detail.xls; Field_Descriptions.xlsx; Freshwater_Species_Data_Sources.xls; FW_Paper_PLOSONE.pdf; FW_Paper_PLOSONE_S1.pdf; FW_Paper_PLOSONE_S2.pdf; FW_Paper_PLOSONE_S3.pdf; FW_Paper_PLOSONE_S4.pdf CALIFORNIA WATER | GROUNDWATER To: GSAs We write to provide a starting point for addressing environmental beneficial users of surface water, as required under the Sustainable Groundwater Management Act (SGMA). SGMA seeks to achieve sustainability, which is defined as the absence of several undesirable results, including “depletions of interconnected surface water that have significant and unreasonable adverse impacts on beneficial users of surface water” (Water Code §10721). The Nature Conservancy (TNC) is a science-based, nonprofit organization with a mission to conserve the lands and waters on which all life depends. Like humans, plants and animals often rely on groundwater for survival, which is why TNC helped develop, and is now helping to implement, SGMA. Earlier this year, we launched the Groundwater Resource Hub, which is an online resource intended to help make it easier and cheaper to address environmental requirements under SGMA. As a first step in addressing when depletions might have an adverse impact, The Nature Conservancy recommends identifying the beneficial users of surface water, which include environmental users. This is a critical step, as it is impossible to define “significant and unreasonable adverse impacts” without knowing what is being impacted. To make this easy, we are providing this letter and the accompanying documents as the best available science on the freshwater species within the boundary of your groundwater sustainability agency (GSA).