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Department of Biology

Faculty Joseph Rachlin



Faculty Joseph RachlinE-mail address:
Phone Number: 718-960-8239
Office: Davis Hall 233 (Lab: Davis Hall 231)
Rank: Professor, Director (LaMER), Fellow of the Linnean Society of London
Degrees and Sources of Degrees: B.S., The City Coll. of New York; M.S., Ph.D., New York Univ.

Research Interests:

  • Fish Ecology - Population Dynamics and Niche Overlap, Fish Systematics - Phylogeny and Cytogenetics, Aquatic Ecology, Estuarine Ecology, Fish and Invertebrate sub-fossils from an archaeological site, Ghazi Shah, Pakistan

The long range activities of this laboratory are to understand the phylogenetic relationships, interactions, and general life histories of both freshwater and marine aquatic organisms. Among the techniques employed are the use of cytogenetics in studies of the interrelationships of monophyletic genera and species, mathematical models for evaluating population dynamics and life histories, and the development of new approaches for the understanding of resource partitioning in aquatic environments. We will also be exploring the use of high-end computer graphics for studies of the comparative morphology of aquatic organisms, and to develop virtual models for studies of form and function.


How to Reach Me:


Selected Publications:

  • 2001    Rachlin, J.W. Transcript of the joint paper (On the Tendency of Species to form Varieties; and on the Perpetuation of Varieties and Species by Natural Selection. By Charles Darwin and Alfred Wallace, London, June 30th, 1858) read before the Linnean Society on July 1st 1858. PDF
  • 2002    Rachlin, J.W., A. Pappantoniou, and B.E. Warkentine.  A Faunal Survey of the Bronx River, New York. The Northeast Natural History Conference VII. 24 April – 27 April 2002. Abst. p. 38-39.
  • 2004    Nickum, J.G., H.L. Bart, Jr., P.R. Bowser, I.E. Greer, C. Hubbs, J.A. Jenkins, J.R. MacMillan, J.W. Rachlin, J.D. Rose, P.W. Sorensen, J.R. Tomasso. Guidelines for the Use of Fishes in Research. American Fisheries Society, Bethesda, Maryland, 53 pages.
  • 2004    Larson, M., D. Sugar, A. Brash, B. Tai, J.W. Rachlin. Phase1: Final Report Fish Passage Needs and Feasibility Assessment. Submitted to NOAA, and The Wildlife Conservation Society. 33 pages + Appendices A-O.
  • 2004    Rachlin,J.W., B.E. Warkentine, and A. Pappantoniou. Ichthyofaunal Survey of the Bronx River, Past and Present. Northeast Natural History Conference VIII. 19 May – 22 May 2004. Abst. p. 52.2004 
  • 2004    Warkentine, B.E., J.W. Rachlin, and A. Pappantoniou.  Assessment of the Planctonic Communities of an Urban Estuarine System. Northeast Natural History Conference VIII. 19 May – 22 May 2004. Abst. p. 56.
  • 2005    Schreibman, M., J.W. Rachlin, and B.E. Warkentine. Examining Chile’s tenth region  and the tri-state estuary models for understanding issues in the management of world fisheries. Pages 205-216. In: Hellman, R.G. and R.A. Dujisin eds., Chile Litoral: Dialogo cientifico sobre los ecosistemas costeros. 406 pages.  Flacso, Santiago Chile.
  •  2006    Rachlin, J.W, B.E. Warkentine and A. Pappantoniou. Bronx River Ichthyofaunal Zonation, as Viewed through a Parsimony Algorithm’s Lens. Northeast Natural History Conference IX. 20 April – 21 April 2006. Abst. P.49.
  •  2007    Rachlin, J.W., B.E. Warkentine, A. Pappantoniou. An evaluation of the ichthyofauna of the Bronx River, a resilient urban waterway. Northeastern Naturalist, 14(4): 531-544.
  • 2008    Rachlin, J.W., B.E. Warkentine, A. Pappantoniou. Use of a parsimony algorithm as a method for evaluating ichthyofaunal distribution and co-occurrence in an urban stream. Journal of Freshwater Ecology, 23 (1): 1-11.
  • 2010    Warkentine, B.E. and J.W. Rachlin. The First Record of Palaemon macrodactylus from the Eastern Coast of North America. Northeastern Naturalist, Vol 17: 91-102.
  • 2011    Cloherty, T.M. and J.W. Rachlin. Physicochemical and shoreline development factors affecting lake littoral benthic macroinvertebrates. Journal of Freshwater Ecology, 26(4): 517-525.
  • 2012    Warkentine, B.E. and J.W. Rachlin. Palaemon macrodactylus Rathbun 1902 (Oriental Shrimp) in New York:Status revisted. Notheastern Naturalist, 19(special issue 6): 173-180.
  • 2012    Rachlin, J.W. and B.E. Warkentine. An evaluation of fish assemblages of the Saw Mill River, New York: An Urban Stream. Northeastern Naturalist, 19(special issue 6): 129-142.
  • 2012    Rachlin, J.W., R. Stalter, D. Kincaid, B.E. Warkentine. 2012. Parsimony analysis of east coast salt marsh plant distributions. Northeastern Naturalist, 19(2): 279-296.
  • 2013    B.E. Warkentine, and J.W. Rachlin. Growth rates, sex ratios, and fecundity of co-occurring shrimp from the East River, New York. The Northeast Natural History Conference XIII, Springfield MA April 13-15 2013. ABS. Sun-AM2-B-3.
  • 2013    Rachlin, J.W., and B.E.Warkentine. Exploratory analysis of marine fish distributions in the New York Bight from a 1984-1986 dataset. The Northeast Natural History Conference XIII, Springfield MA April 13-15 2013. ABS. Sun-AM2-B-4.
  • 2015    Warkentine, B.E. and J. W. Rachlin. Water quality assessment of two slow-moving sandy bottom sites on the Saw Mill River, New York. Northeastern Naturalist 22(1): NENHC-56-NENHC-69.
  • 2017    Rachlin, J.W., R. Stalter, D. Kincaid, B.E. Warkentine. “The effect of super storm Sandy on salt marsh vascular flora in the New York Bight.” Journal of the Torrey Botanical Society 144(1): 40 – 46.
  • 2018    Tiwari, A. and J.W. Rachlin. A review of road salt ecological impacts. Northeastern Naturalist 25(1): 123-142.
  • 2018    Stalter, R., and J. Rachlin. The vascular plant species of sidewalk plots in Brooklyn and Queens: New York City’s overlooked “island” flora. Journal of the Torrey Botanical Society 145(3): 263-270.
  • 2021    Stalter, R. and J. Rachlin. Eighty-three years of vascular plant change at Alley Pond Park, Queens County, New York. Journal of the Torrey Botanical Society 148(1): 75-84.

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